Change light defaults & fix light examples (#11581)

# Objective

Fix https://github.com/bevyengine/bevy/issues/11577.

## Solution

Fix the examples, add a few constants to make setting light values
easier, and change the default lighting settings to be more realistic.
(Now designed for an overcast day instead of an indoor environment)

---

I did not include any example-related changes in here.

## Changelogs (not including breaking changes)

### bevy_pbr

- Added `light_consts` module (included in prelude), which contains
common lux and lumen values for lights.
- Added `AmbientLight::NONE` constant, which is an ambient light with a
brightness of 0.
- Added non-EV100 variants for `ExposureSettings`'s EV100 constants,
which allow easier construction of an `ExposureSettings` from a EV100
constant.

## Breaking changes

### bevy_pbr

The several default lighting values were changed:

- `PointLight`'s default `intensity` is now `2000.0`
- `SpotLight`'s default `intensity` is now `2000.0`
- `DirectionalLight`'s default `illuminance` is now
`light_consts::lux::OVERCAST_DAY` (`1000.`)
- `AmbientLight`'s default `brightness` is now `20.0`

crates/bevy_pbr/src/lib.rs

@@ -42,7 +42,7 @@ pub mod prelude {
             SpotLightBundle,
         },
         fog::{FogFalloff, FogSettings},
-        light::{AmbientLight, DirectionalLight, PointLight, SpotLight},
+        light::{light_consts, AmbientLight, DirectionalLight, PointLight, SpotLight},
         light_probe::{
             environment_map::{EnvironmentMapLight, ReflectionProbeBundle},
             LightProbe,

crates/bevy_pbr/src/light.rs

@@ -21,6 +21,61 @@ use bevy_utils::tracing::warn;
 
 use crate::*;
 
+/// Constants for operating with the light units: lumens, and lux.
+pub mod light_consts {
+    /// Approximations for converting the wattage of lamps to lumens.
+    ///
+    /// The **lumen** (symbol: **lm**) is the unit of [luminous flux], a measure
+    /// of the total quantity of [visible light] emitted by a source per unit of
+    /// time, in the [International System of Units] (SI).
+    ///
+    /// For more information, see [wikipedia](https://en.wikipedia.org/wiki/Lumen_(unit))
+    ///
+    /// [luminous flux]: https://en.wikipedia.org/wiki/Luminous_flux
+    /// [visible light]: https://en.wikipedia.org/wiki/Visible_light
+    /// [International System of Units]: https://en.wikipedia.org/wiki/International_System_of_Units
+    pub mod lumens {
+        pub const LUMENS_PER_LED_WATTS: f32 = 90.0;
+        pub const LUMENS_PER_INCANDESCENT_WATTS: f32 = 13.8;
+        pub const LUMENS_PER_HALOGEN_WATTS: f32 = 19.8;
+    }
+
+    /// Predefined for lux values in several locations.
+    ///
+    /// The **lux** (symbol: **lx**) is the unit of [illuminance], or [luminous flux] per unit area,
+    /// in the [International System of Units] (SI). It is equal to one lumen per square metre.
+    ///
+    /// For more information, see [wikipedia](https://en.wikipedia.org/wiki/Lux)
+    ///
+    /// [illuminance]: https://en.wikipedia.org/wiki/Illuminance
+    /// [luminous flux]: https://en.wikipedia.org/wiki/Luminous_flux
+    /// [International System of Units]: https://en.wikipedia.org/wiki/International_System_of_Units
+    pub mod lux {
+        /// The amount of light (lux) in a moonless, overcast night sky. (starlight)
+        pub const MOONLESS_NIGHT: f32 = 0.0001;
+        /// The amount of light (lux) during a full moon on a clear night.
+        pub const FULL_MOON_NIGHT: f32 = 0.05;
+        /// The amount of light (lux) during the dark limit of civil twilight under a clear sky.
+        pub const CIVIL_TWILIGHT: f32 = 3.4;
+        /// The amount of light (lux) in family living room lights.
+        pub const LIVING_ROOM: f32 = 50.;
+        /// The amount of light (lux) in an office building's hallway/toilet lighting.
+        pub const HALLWAY: f32 = 80.;
+        /// The amount of light (lux) in very dark overcast day
+        pub const DARK_OVERCAST_DAY: f32 = 100.;
+        /// The amount of light (lux) in an office.
+        pub const OFFICE: f32 = 320.;
+        /// The amount of light (lux) during sunrise or sunset on a clear day.
+        pub const CLEAR_SUNRISE: f32 = 400.;
+        /// The amount of light (lux) on a overcast day; typical TV studio lighting
+        pub const OVERCAST_DAY: f32 = 1000.;
+        /// The amount of light (lux) in full daylight (not direct sun).
+        pub const FULL_DAYLIGHT: f32 = 10_000.;
+        /// The amount of light (lux) in direct sunlight.
+        pub const DIRECT_SUNLIGHT: f32 = 50_000.;
+    }
+}
+
 /// A light that emits light in all directions from a central point.
 ///
 /// Real-world values for `intensity` (luminous power in lumens) based on the electrical power
@@ -58,7 +113,7 @@ impl Default for PointLight {
     fn default() -> Self {
         PointLight {
             color: Color::rgb(1.0, 1.0, 1.0),
-            intensity: 800.0, // Roughly a 60W non-halogen incandescent bulb
+            intensity: 2000.0, // Roughly a 20-watt LED bulb
             range: 20.0,
             radius: 0.0,
             shadows_enabled: false,
@@ -126,7 +181,7 @@ impl Default for SpotLight {
         // a quarter arc attenuating from the center
         Self {
             color: Color::rgb(1.0, 1.0, 1.0),
-            intensity: 800.0, // Roughly a 60W non-halogen incandescent bulb
+            intensity: 2000.0, // Roughly a 20-watt LED bulb
             range: 20.0,
             radius: 0.0,
             shadows_enabled: false,
@@ -207,7 +262,7 @@ impl Default for DirectionalLight {
     fn default() -> Self {
         DirectionalLight {
             color: Color::rgb(1.0, 1.0, 1.0),
-            illuminance: 100000.0,
+            illuminance: light_consts::lux::OVERCAST_DAY,
             shadows_enabled: false,
             shadow_depth_bias: Self::DEFAULT_SHADOW_DEPTH_BIAS,
             shadow_normal_bias: Self::DEFAULT_SHADOW_NORMAL_BIAS,
@@ -567,7 +622,7 @@ fn calculate_cascade(
 /// # use bevy_ecs::system::ResMut;
 /// # use bevy_pbr::AmbientLight;
 /// fn setup_ambient_light(mut ambient_light: ResMut<AmbientLight>) {
-///    ambient_light.brightness = 20.0;
+///    ambient_light.brightness = 100.0;
 /// }
 /// ```
 #[derive(Resource, Clone, Debug, ExtractResource, Reflect)]
@@ -581,11 +636,17 @@ pub struct AmbientLight {
 impl Default for AmbientLight {
     fn default() -> Self {
         Self {
-            color: Color::rgb(1.0, 1.0, 1.0),
+            color: Color::WHITE,
-            brightness: 8.0,
+            brightness: 20.0,
         }
     }
 }
+impl AmbientLight {
+    pub const NONE: AmbientLight = AmbientLight {
+        color: Color::WHITE,
+        brightness: 0.0,
+    };
+}
 
 /// Add this component to make a [`Mesh`](bevy_render::mesh::Mesh) not cast shadows.
 #[derive(Component, Reflect, Default)]

crates/bevy_render/src/camera/camera.rs

@@ -96,6 +96,16 @@ pub struct ExposureSettings {
 }
 
 impl ExposureSettings {
+    pub const SUNLIGHT: Self = Self {
+        ev100: Self::EV100_SUNLIGHT,
+    };
+    pub const OVERCAST: Self = Self {
+        ev100: Self::EV100_OVERCAST,
+    };
+    pub const INDOOR: Self = Self {
+        ev100: Self::EV100_INDOOR,
+    };
+
     pub const EV100_SUNLIGHT: f32 = 15.0;
     pub const EV100_OVERCAST: f32 = 12.0;
     pub const EV100_INDOOR: f32 = 7.0;
@@ -116,9 +126,7 @@ impl ExposureSettings {
 
 impl Default for ExposureSettings {
     fn default() -> Self {
-        Self {
+        Self::INDOOR
-            ev100: Self::EV100_INDOOR,
-        }
     }
 }
 

examples/3d/3d_gizmos.rs

@@ -41,13 +41,13 @@ fn setup(
         ..default()
     });
     // light
-    commands.spawn(PointLightBundle {
+    commands.spawn(DirectionalLightBundle {
-        point_light: PointLight {
+        directional_light: DirectionalLight {
-            intensity: 250000.0,
+            illuminance: light_consts::lux::OVERCAST_DAY,
             shadows_enabled: true,
             ..default()
         },
-        transform: Transform::from_xyz(4.0, 8.0, 4.0),
+        transform: Transform::from_xyz(4.0, 8.0, 4.0).looking_at(Vec3::ZERO, Vec3::Y),
         ..default()
     });
 

examples/3d/3d_scene.rs

@@ -30,13 +30,13 @@ fn setup(
         ..default()
     });
     // light
-    commands.spawn(PointLightBundle {
+    commands.spawn(DirectionalLightBundle {
-        point_light: PointLight {
+        directional_light: DirectionalLight {
-            intensity: 250_000.0,
+            illuminance: light_consts::lux::OVERCAST_DAY,
             shadows_enabled: true,
             ..default()
         },
-        transform: Transform::from_xyz(4.0, 8.0, 4.0),
+        transform: Transform::from_xyz(4.0, 8.0, 4.0).looking_at(Vec3::ZERO, Vec3::Y),
         ..default()
     });
     // camera

examples/3d/3d_shapes.rs

@@ -64,14 +64,13 @@ fn setup(
         ));
     }
 
-    commands.spawn(PointLightBundle {
+    commands.spawn(DirectionalLightBundle {
-        point_light: PointLight {
+        directional_light: DirectionalLight {
-            intensity: 1500000.0,
+            illuminance: light_consts::lux::OVERCAST_DAY,
-            range: 100.,
             shadows_enabled: true,
             ..default()
         },
-        transform: Transform::from_xyz(8.0, 16.0, 8.0),
+        transform: Transform::from_xyz(8.0, 16.0, 8.0).looking_at(Vec3::ZERO, Vec3::Y),
         ..default()
     });
 

examples/3d/3d_viewport_to_world.rs

@@ -66,10 +66,7 @@ fn setup(
     // light
     commands.spawn(DirectionalLightBundle {
         transform: Transform::from_translation(Vec3::ONE).looking_at(Vec3::ZERO, Vec3::Y),
-        directional_light: DirectionalLight {
+        directional_light: DirectionalLight::default(),
-            illuminance: 2000.0,
-            ..default()
-        },
         ..default()
     });
 

examples/3d/animated_material.rs

@@ -25,7 +25,7 @@ fn setup(
         EnvironmentMapLight {
             diffuse_map: asset_server.load("environment_maps/pisa_diffuse_rgb9e5_zstd.ktx2"),
             specular_map: asset_server.load("environment_maps/pisa_specular_rgb9e5_zstd.ktx2"),
-            intensity: 1500.0,
+            intensity: 1_000.0,
         },
     ));
 

examples/3d/anti_aliasing.rs

@@ -289,7 +289,7 @@ fn setup(
     // Light
     commands.spawn(DirectionalLightBundle {
         directional_light: DirectionalLight {
-            illuminance: 3000.0,
+            illuminance: light_consts::lux::OVERCAST_DAY,
             shadows_enabled: true,
             ..default()
         },

examples/3d/atmospheric_fog.rs

@@ -61,7 +61,7 @@ fn setup_terrain_scene(
     commands.spawn(DirectionalLightBundle {
         directional_light: DirectionalLight {
             color: Color::rgb(0.98, 0.95, 0.82),
-            illuminance: 3000.0,
+            illuminance: light_consts::lux::OVERCAST_DAY,
             shadows_enabled: true,
             ..default()
         },

examples/3d/blend_modes.rs

@@ -167,12 +167,12 @@ fn setup(
     }
 
     // Light
-    commands.spawn(PointLightBundle {
+    commands.spawn(DirectionalLightBundle {
-        point_light: PointLight {
+        directional_light: DirectionalLight {
-            intensity: 150_000.0,
+            illuminance: light_consts::lux::OVERCAST_DAY,
             ..default()
         },
-        transform: Transform::from_xyz(4.0, 8.0, 4.0),
+        transform: Transform::from_xyz(4.0, 8.0, 4.0).looking_at(Vec3::ZERO, Vec3::Y),
         ..default()
     });
 

examples/3d/deferred_rendering.rs

@@ -18,10 +18,6 @@ fn main() {
     App::new()
         .insert_resource(Msaa::Off)
         .insert_resource(DefaultOpaqueRendererMethod::deferred())
-        .insert_resource(AmbientLight {
-            color: Color::WHITE,
-            brightness: 1.0 / 5.0f32,
-        })
         .insert_resource(DirectionalLightShadowMap { size: 4096 })
         .add_plugins(DefaultPlugins)
         .insert_resource(Normal(None))
@@ -62,7 +58,7 @@ fn setup(
         EnvironmentMapLight {
             diffuse_map: asset_server.load("environment_maps/pisa_diffuse_rgb9e5_zstd.ktx2"),
             specular_map: asset_server.load("environment_maps/pisa_specular_rgb9e5_zstd.ktx2"),
-            intensity: 150.0,
+            intensity: 250.0,
         },
         DepthPrepass,
         MotionVectorPrepass,
@@ -72,7 +68,7 @@ fn setup(
 
     commands.spawn(DirectionalLightBundle {
         directional_light: DirectionalLight {
-            illuminance: 4000.0,
+            illuminance: light_consts::lux::OVERCAST_DAY,
             shadows_enabled: true,
             ..default()
         },

examples/3d/fog.rs

@@ -17,10 +17,12 @@
 use bevy::{
     pbr::{NotShadowCaster, NotShadowReceiver},
     prelude::*,
+    render::camera::ExposureSettings,
 };
 
 fn main() {
     App::new()
+        .insert_resource(AmbientLight::NONE)
         .add_plugins(DefaultPlugins)
         .add_systems(
             Startup,
@@ -41,6 +43,9 @@ fn setup_camera_fog(mut commands: Commands) {
             },
             ..default()
         },
+        // This is a dark scene,
+        // increasing the exposure makes it easier to see
+        ExposureSettings { ev100: 4.0 },
     ));
 }
 
@@ -114,8 +119,7 @@ fn setup_pyramid_scene(
     commands.spawn(PointLightBundle {
         transform: Transform::from_xyz(0.0, 1.0, 0.0),
         point_light: PointLight {
-            intensity: 300_000.,
+            intensity: 4_000.,
-            range: 100.,
             shadows_enabled: true,
             ..default()
         },

examples/3d/generate_custom_mesh.rs

@@ -57,10 +57,9 @@ fn setup(
     });
 
     // Light up the scene.
-    commands.spawn(PointLightBundle {
+    commands.spawn(DirectionalLightBundle {
-        point_light: PointLight {
+        directional_light: DirectionalLight {
-            intensity: 100_000.0,
+            illuminance: light_consts::lux::OVERCAST_DAY,
-            range: 100.0,
             ..default()
         },
         transform: camera_and_light_transform,

examples/3d/lighting.rs

@@ -4,7 +4,7 @@
 use std::f32::consts::PI;
 
 use bevy::{
-    pbr::CascadeShadowConfigBuilder,
+    pbr::{light_consts, CascadeShadowConfigBuilder},
     prelude::*,
     render::camera::{ExposureSettings, PhysicalCameraParameters},
 };
@@ -14,8 +14,8 @@ fn main() {
         .add_plugins(DefaultPlugins)
         .insert_resource(Parameters(PhysicalCameraParameters {
             aperture_f_stops: 1.0,
-            shutter_speed_s: 1.0 / 15.0,
+            shutter_speed_s: 1.0 / 100.0,
-            sensitivity_iso: 400.0,
+            sensitivity_iso: 100.0,
         }))
         .add_systems(Startup, setup)
         .add_systems(Update, (update_exposure, movement, animate_light_direction))
@@ -207,7 +207,7 @@ fn setup(
     // directional 'sun' light
     commands.spawn(DirectionalLightBundle {
         directional_light: DirectionalLight {
-            illuminance: 100.0,
+            illuminance: light_consts::lux::OVERCAST_DAY,
             shadows_enabled: true,
             ..default()
         },

examples/3d/lightmaps.rs

@@ -21,10 +21,10 @@ fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
         ..default()
     });
 
-    commands.spawn(Camera3dBundle {
+    commands.spawn((Camera3dBundle {
         transform: Transform::from_xyz(-278.0, 273.0, 800.0),
         ..default()
-    });
+    },));
 }
 
 fn add_lightmaps_to_meshes(

examples/3d/load_gltf.rs

@@ -25,13 +25,13 @@ fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
         EnvironmentMapLight {
             diffuse_map: asset_server.load("environment_maps/pisa_diffuse_rgb9e5_zstd.ktx2"),
             specular_map: asset_server.load("environment_maps/pisa_specular_rgb9e5_zstd.ktx2"),
-            intensity: 150.0,
+            intensity: 250.0,
         },
     ));
 
     commands.spawn(DirectionalLightBundle {
         directional_light: DirectionalLight {
-            illuminance: 2000.0,
+            illuminance: light_consts::lux::OVERCAST_DAY,
             shadows_enabled: true,
             ..default()
         },

examples/3d/orthographic.rs

@@ -59,10 +59,10 @@ fn setup(
         ..default()
     });
     // light
-    commands.spawn(PointLightBundle {
+    commands.spawn(DirectionalLightBundle {
-        transform: Transform::from_xyz(3.0, 8.0, 5.0),
+        transform: Transform::from_xyz(3.0, 8.0, 5.0).looking_at(Vec3::ZERO, Vec3::Y),
-        point_light: PointLight {
+        directional_light: DirectionalLight {
-            intensity: 150_000.0,
+            illuminance: light_consts::lux::OVERCAST_DAY,
             ..default()
         },
         ..default()

examples/3d/parallax_mapping.rs

@@ -224,7 +224,7 @@ fn setup(
         .spawn(PointLightBundle {
             transform: Transform::from_xyz(1.8, 0.7, -1.1),
             point_light: PointLight {
-                intensity: 50_000.0,
+                intensity: 100_000.0, // Mini-sun point light
                 shadows_enabled: true,
                 ..default()
             },

examples/3d/parenting.rs

@@ -55,10 +55,10 @@ fn setup(
             });
         });
     // light
-    commands.spawn(PointLightBundle {
+    commands.spawn(DirectionalLightBundle {
-        transform: Transform::from_xyz(4.0, 5.0, -4.0),
+        transform: Transform::from_xyz(4.0, 5.0, -4.0).looking_at(Vec3::ZERO, Vec3::Y),
-        point_light: PointLight {
+        directional_light: DirectionalLight {
-            intensity: 150_000.0,
+            illuminance: light_consts::lux::OVERCAST_DAY,
             ..default()
         },
         ..default()

examples/3d/pbr.rs

@@ -1,6 +1,6 @@
 //! This example shows how to configure Physically Based Rendering (PBR) parameters.
 
-use bevy::{asset::LoadState, prelude::*};
+use bevy::{asset::LoadState, prelude::*, render::camera::ExposureSettings};
 
 fn main() {
     App::new()
@@ -51,17 +51,6 @@ fn setup(
         ..default()
     });
 
-    // light
-    commands.spawn(PointLightBundle {
-        transform: Transform::from_xyz(50.0, 50.0, 50.0),
-        point_light: PointLight {
-            intensity: 100_000_000.,
-            range: 100.,
-            ..default()
-        },
-        ..default()
-    });
-
     // labels
     commands.spawn(
         TextBundle::from_section(
@@ -132,8 +121,9 @@ fn setup(
         EnvironmentMapLight {
             diffuse_map: asset_server.load("environment_maps/pisa_diffuse_rgb9e5_zstd.ktx2"),
             specular_map: asset_server.load("environment_maps/pisa_specular_rgb9e5_zstd.ktx2"),
-            intensity: 150.0,
+            intensity: 7000.0,
         },
+        ExposureSettings::OVERCAST,
     ));
 }
 

examples/3d/reflection_probes.rs

@@ -8,6 +8,7 @@
 
 use bevy::core_pipeline::Skybox;
 use bevy::prelude::*;
+use bevy::render::camera::ExposureSettings;
 
 use std::fmt::{Display, Formatter, Result as FmtResult};
 
@@ -105,14 +106,17 @@ fn spawn_scene(commands: &mut Commands, asset_server: &AssetServer) {
 
 // Spawns the camera.
 fn spawn_camera(commands: &mut Commands) {
-    commands.spawn(Camera3dBundle {
+    commands.spawn((
-        camera: Camera {
+        Camera3dBundle {
-            hdr: true,
+            camera: Camera {
+                hdr: true,
+                ..default()
+            },
+            transform: Transform::from_xyz(-6.483, 0.325, 4.381).looking_at(Vec3::ZERO, Vec3::Y),
             ..default()
         },
-        transform: Transform::from_xyz(-6.483, 0.325, 4.381).looking_at(Vec3::ZERO, Vec3::Y),
+        ExposureSettings::OVERCAST,
-        ..default()
+    ));
-    });
 }
 
 // Creates the sphere mesh and spawns it.
@@ -150,7 +154,7 @@ fn spawn_reflection_probe(commands: &mut Commands, cubemaps: &Cubemaps) {
         environment_map: EnvironmentMapLight {
             diffuse_map: cubemaps.diffuse.clone(),
             specular_map: cubemaps.specular_reflection_probe.clone(),
-            intensity: 150.0,
+            intensity: 5000.0,
         },
     });
 }
@@ -186,7 +190,7 @@ fn add_environment_map_to_camera(
             .insert(create_camera_environment_map_light(&cubemaps))
             .insert(Skybox {
                 image: cubemaps.skybox.clone(),
-                brightness: 150.0,
+                brightness: 5000.0,
             });
     }
 }
@@ -305,7 +309,7 @@ fn create_camera_environment_map_light(cubemaps: &Cubemaps) -> EnvironmentMapLig
     EnvironmentMapLight {
         diffuse_map: cubemaps.diffuse.clone(),
         specular_map: cubemaps.specular_environment_map.clone(),
-        intensity: 150.0,
+        intensity: 5000.0,
     }
 }
 

examples/3d/render_to_texture.rs

@@ -89,17 +89,7 @@ fn setup(
     // NOTE: we add the light to all layers so it affects both the rendered-to-texture cube, and the cube on which we display the texture
     // Setting the layer to RenderLayers::layer(0) would cause the main view to be lit, but the rendered-to-texture cube to be unlit.
     // Setting the layer to RenderLayers::layer(1) would cause the rendered-to-texture cube to be lit, but the main view to be unlit.
-    commands.spawn((
+    commands.spawn((DirectionalLightBundle::default(), RenderLayers::all()));
-        PointLightBundle {
-            transform: Transform::from_translation(Vec3::new(0.0, 0.0, 10.0)),
-            point_light: PointLight {
-                intensity: 150_000.0,
-                ..default()
-            },
-            ..default()
-        },
-        RenderLayers::all(),
-    ));
 
     commands.spawn((
         Camera3dBundle {

examples/3d/shadow_biases.rs

@@ -3,7 +3,10 @@
 #[path = "../helpers/camera_controller.rs"]
 mod camera_controller;
 
-use bevy::{pbr::ShadowFilteringMethod, prelude::*};
+use bevy::{
+    pbr::{light_consts, ShadowFilteringMethod},
+    prelude::*,
+};
 use camera_controller::{CameraController, CameraControllerPlugin};
 
 fn main() {
@@ -68,7 +71,7 @@ fn setup(
             });
             builder.spawn(DirectionalLightBundle {
                 directional_light: DirectionalLight {
-                    illuminance: 1500.0,
+                    illuminance: light_consts::lux::OVERCAST_DAY,
                     shadow_depth_bias: 0.0,
                     shadow_normal_bias: 0.0,
                     shadows_enabled: true,

examples/3d/shadow_caster_receiver.rs

@@ -3,7 +3,7 @@
 use std::f32::consts::PI;
 
 use bevy::{
-    pbr::{CascadeShadowConfigBuilder, NotShadowCaster, NotShadowReceiver},
+    pbr::{light_consts, CascadeShadowConfigBuilder, NotShadowCaster, NotShadowReceiver},
     prelude::*,
 };
 
@@ -92,7 +92,7 @@ fn setup(
 
     commands.spawn(DirectionalLightBundle {
         directional_light: DirectionalLight {
-            illuminance: 1500.0,
+            illuminance: light_consts::lux::OVERCAST_DAY,
             shadows_enabled: true,
             ..default()
         },
@@ -128,7 +128,7 @@ fn toggle_light(
         for mut light in &mut point_lights {
             light.intensity = if light.intensity == 0.0 {
                 println!("Using PointLight");
-                500_000.0
+                1_000_000.0 // Mini-sun point light
             } else {
                 0.0
             };
@@ -136,7 +136,7 @@ fn toggle_light(
         for mut light in &mut directional_lights {
             light.illuminance = if light.illuminance == 0.0 {
                 println!("Using DirectionalLight");
-                1500.0
+                light_consts::lux::OVERCAST_DAY
             } else {
                 0.0
             };

examples/3d/spherical_area_lights.rs

@@ -4,6 +4,7 @@ use bevy::prelude::*;
 
 fn main() {
     App::new()
+        .insert_resource(AmbientLight::NONE)
         .add_plugins(DefaultPlugins)
         .add_systems(Startup, setup)
         .run();
@@ -15,10 +16,10 @@ fn setup(
     mut materials: ResMut<Assets<StandardMaterial>>,
 ) {
     // camera
-    commands.spawn(Camera3dBundle {
+    commands.spawn((Camera3dBundle {
         transform: Transform::from_xyz(0.2, 1.5, 2.5).looking_at(Vec3::ZERO, Vec3::Y),
         ..default()
-    });
+    },));
 
     // plane
     commands.spawn(PbrBundle {
@@ -58,7 +59,7 @@ fn setup(
             .with_children(|children| {
                 children.spawn(PointLightBundle {
                     point_light: PointLight {
-                        intensity: 100_000.0,
+                        intensity: 4000.0,
                         radius,
                         color: Color::rgb(0.2, 0.2, 1.0),
                         ..default()

examples/3d/split_screen.rs

@@ -37,7 +37,6 @@ fn setup(
     commands.spawn(DirectionalLightBundle {
         transform: Transform::from_rotation(Quat::from_euler(EulerRot::ZYX, 0.0, 1.0, -PI / 4.)),
         directional_light: DirectionalLight {
-            illuminance: 1500.0,
             shadows_enabled: true,
             ..default()
         },

examples/3d/spotlight.rs

@@ -2,11 +2,7 @@
 
 use std::f32::consts::*;
 
-use bevy::{
+use bevy::{pbr::NotShadowCaster, prelude::*};
-    diagnostic::{FrameTimeDiagnosticsPlugin, LogDiagnosticsPlugin},
-    pbr::NotShadowCaster,
-    prelude::*,
-};
 use rand::{rngs::StdRng, Rng, SeedableRng};
 
 fn main() {
@@ -15,11 +11,7 @@ fn main() {
             brightness: 4.0,
             ..default()
         })
-        .add_plugins((
+        .add_plugins(DefaultPlugins)
-            DefaultPlugins,
-            FrameTimeDiagnosticsPlugin,
-            LogDiagnosticsPlugin::default(),
-        ))
         .add_systems(Startup, setup)
         .add_systems(Update, (light_sway, movement))
         .run();
@@ -82,7 +74,7 @@ fn setup(
                     transform: Transform::from_xyz(1.0 + x, 2.0, z)
                         .looking_at(Vec3::new(1.0 + x, 0.0, z), Vec3::X),
                     spot_light: SpotLight {
-                        intensity: 100_000.0, // lumens
+                        intensity: 4000.0, // lumens
                         color: Color::WHITE,
                         shadows_enabled: true,
                         inner_angle: PI / 4.0 * 0.85,
@@ -111,14 +103,14 @@ fn setup(
     }
 
     // camera
-    commands.spawn((Camera3dBundle {
+    commands.spawn(Camera3dBundle {
         camera: Camera {
             hdr: true,
             ..default()
         },
         transform: Transform::from_xyz(-4.0, 5.0, 10.0).looking_at(Vec3::ZERO, Vec3::Y),
         ..default()
-    },));
+    });
 }
 
 fn light_sway(time: Res<Time>, mut query: Query<(&mut Transform, &mut SpotLight)>) {

examples/3d/ssao.rs

@@ -3,7 +3,7 @@
 use bevy::{
     core_pipeline::experimental::taa::{TemporalAntiAliasBundle, TemporalAntiAliasPlugin},
     pbr::{
-        ScreenSpaceAmbientOcclusionBundle, ScreenSpaceAmbientOcclusionQualityLevel,
+        light_consts, ScreenSpaceAmbientOcclusionBundle, ScreenSpaceAmbientOcclusionQualityLevel,
         ScreenSpaceAmbientOcclusionSettings,
     },
     prelude::*,
@@ -14,7 +14,7 @@ use std::f32::consts::PI;
 fn main() {
     App::new()
         .insert_resource(AmbientLight {
-            brightness: 750.0,
+            brightness: light_consts::lux::OVERCAST_DAY,
             ..default()
         })
         .add_plugins((DefaultPlugins, TemporalAntiAliasPlugin))
@@ -81,7 +81,7 @@ fn setup(
 
     commands.spawn(DirectionalLightBundle {
         directional_light: DirectionalLight {
-            illuminance: 3000.0,
+            illuminance: light_consts::lux::OVERCAST_DAY,
             shadows_enabled: true,
             ..default()
         },

examples/3d/tonemapping.rs

@@ -2,7 +2,7 @@
 
 use bevy::{
     core_pipeline::tonemapping::Tonemapping,
-    pbr::CascadeShadowConfigBuilder,
+    pbr::{light_consts, CascadeShadowConfigBuilder},
     prelude::*,
     reflect::TypePath,
     render::{
@@ -76,7 +76,7 @@ fn setup(
         EnvironmentMapLight {
             diffuse_map: asset_server.load("environment_maps/pisa_diffuse_rgb9e5_zstd.ktx2"),
             specular_map: asset_server.load("environment_maps/pisa_specular_rgb9e5_zstd.ktx2"),
-            intensity: 150.0,
+            intensity: 50.0,
         },
     ));
 
@@ -192,7 +192,7 @@ fn setup_basic_scene(
         DirectionalLightBundle {
             directional_light: DirectionalLight {
                 shadows_enabled: true,
-                illuminance: 3000.0,
+                illuminance: light_consts::lux::OVERCAST_DAY,
                 ..default()
             },
             transform: Transform::from_rotation(Quat::from_euler(

examples/3d/transmission.rs

@@ -27,7 +27,7 @@ use bevy::{
     },
     pbr::{NotShadowCaster, PointLightShadowMap, TransmittedShadowReceiver},
     prelude::*,
-    render::camera::TemporalJitter,
+    render::camera::{ExposureSettings, TemporalJitter},
     render::view::ColorGrading,
 };
 
@@ -35,7 +35,6 @@ use bevy::{
 use bevy::core_pipeline::experimental::taa::{
     TemporalAntiAliasBundle, TemporalAntiAliasPlugin, TemporalAntiAliasSettings,
 };
-
 use rand::random;
 
 fn main() {
@@ -311,7 +310,7 @@ fn setup(
             transform: Transform::from_xyz(-1.0, 1.7, 0.0),
             point_light: PointLight {
                 color: Color::ANTIQUE_WHITE * 0.8 + Color::ORANGE_RED * 0.2,
-                intensity: 60_000.0,
+                intensity: 4_000.0,
                 radius: 0.2,
                 range: 5.0,
                 shadows_enabled: true,
@@ -345,6 +344,7 @@ fn setup(
             specular_map: asset_server.load("environment_maps/pisa_specular_rgb9e5_zstd.ktx2"),
         },
         BloomSettings::default(),
+        ExposureSettings { ev100: 6.0 },
     ));
 
     // Controls Text
@@ -634,7 +634,7 @@ fn flicker_system(
     let c = (s * 7.0).cos() * 0.0125 + (s * 2.0).cos() * 0.025;
     let (mut light, mut light_transform) = light.single_mut();
     let mut flame_transform = flame.single_mut();
-    light.intensity = 60_000.0 + 3000.0 * (a + b + c);
+    light.intensity = 4_000.0 + 3000.0 * (a + b + c);
     flame_transform.translation = Vec3::new(-1.0, 1.23, 0.0);
     flame_transform.look_at(Vec3::new(-1.0 - c, 1.7 - b, 0.0 - a), Vec3::X);
     flame_transform.rotate(Quat::from_euler(EulerRot::XYZ, 0.0, 0.0, PI / 2.0));

examples/3d/transparency_3d.rs

@@ -18,13 +18,14 @@ fn setup(
     mut meshes: ResMut<Assets<Mesh>>,
     mut materials: ResMut<Assets<StandardMaterial>>,
 ) {
-    // opaque plane, uses `alpha_mode: Opaque` by default
+    // Opaque plane, uses `alpha_mode: Opaque` by default
     commands.spawn(PbrBundle {
         mesh: meshes.add(Plane3d::default().mesh().size(6.0, 6.0)),
         material: materials.add(Color::rgb(0.3, 0.5, 0.3)),
         ..default()
     });
-    // transparent sphere, uses `alpha_mode: Mask(f32)`
+
+    // Transparent sphere, uses `alpha_mode: Mask(f32)`
     commands.spawn(PbrBundle {
         mesh: meshes.add(Sphere::new(0.5).mesh().ico(3).unwrap()),
         material: materials.add(StandardMaterial {
@@ -41,7 +42,8 @@ fn setup(
         transform: Transform::from_xyz(1.0, 0.5, -1.5),
         ..default()
     });
-    // transparent unlit sphere, uses `alpha_mode: Mask(f32)`
+
+    // Transparent unlit sphere, uses `alpha_mode: Mask(f32)`
     commands.spawn(PbrBundle {
         mesh: meshes.add(Sphere::new(0.5).mesh().ico(3).unwrap()),
         material: materials.add(StandardMaterial {
@@ -53,7 +55,8 @@ fn setup(
         transform: Transform::from_xyz(-1.0, 0.5, -1.5),
         ..default()
     });
-    // transparent cube, uses `alpha_mode: Blend`
+
+    // Transparent cube, uses `alpha_mode: Blend`
     commands.spawn(PbrBundle {
         mesh: meshes.add(Cuboid::default()),
         // Notice how there is no need to set the `alpha_mode` explicitly here.
@@ -63,24 +66,27 @@ fn setup(
         transform: Transform::from_xyz(0.0, 0.5, 0.0),
         ..default()
     });
-    // opaque sphere
+
+    // Opaque sphere
     commands.spawn(PbrBundle {
         mesh: meshes.add(Sphere::new(0.5).mesh().ico(3).unwrap()),
         material: materials.add(Color::rgb(0.7, 0.2, 0.1)),
         transform: Transform::from_xyz(0.0, 0.5, -1.5),
         ..default()
     });
-    // light
+
-    commands.spawn(PointLightBundle {
+    // Light
-        point_light: PointLight {
+    commands.spawn(DirectionalLightBundle {
-            intensity: 1_000_000.0,
+        directional_light: DirectionalLight {
+            illuminance: light_consts::lux::OVERCAST_DAY,
             shadows_enabled: true,
             ..default()
         },
-        transform: Transform::from_xyz(4.0, 8.0, 4.0),
+        transform: Transform::from_xyz(4.0, 8.0, 4.0).looking_at(Vec3::ZERO, Vec3::Y),
         ..default()
     });
-    // camera
+
+    // Camera
     commands.spawn(Camera3dBundle {
         transform: Transform::from_xyz(-2.0, 3.0, 5.0).looking_at(Vec3::ZERO, Vec3::Y),
         ..default()

examples/3d/two_passes.rs

@@ -9,36 +9,39 @@ fn main() {
         .run();
 }
 
-/// set up a simple 3D scene
+/// Set up a simple 3D scene
 fn setup(
     mut commands: Commands,
     mut meshes: ResMut<Assets<Mesh>>,
     mut materials: ResMut<Assets<StandardMaterial>>,
 ) {
-    // plane
+    // Plane
     commands.spawn(PbrBundle {
         mesh: meshes.add(Plane3d::default().mesh().size(5.0, 5.0)),
         material: materials.add(Color::rgb(0.3, 0.5, 0.3)),
         ..default()
     });
-    // cube
+
+    // Cube
     commands.spawn(PbrBundle {
         mesh: meshes.add(Cuboid::default()),
         material: materials.add(Color::rgb(0.8, 0.7, 0.6)),
         transform: Transform::from_xyz(0.0, 0.5, 0.0),
         ..default()
     });
-    // light
+
-    commands.spawn(PointLightBundle {
+    // Light
-        point_light: PointLight {
+    commands.spawn(DirectionalLightBundle {
-            intensity: 500_000.0,
+        directional_light: DirectionalLight {
+            illuminance: light_consts::lux::OVERCAST_DAY,
             shadows_enabled: true,
             ..default()
         },
-        transform: Transform::from_xyz(4.0, 8.0, 4.0),
+        transform: Transform::from_xyz(4.0, 8.0, 4.0).looking_at(Vec3::ZERO, Vec3::Y),
         ..default()
     });
-    // camera
+
+    // Camera
     commands.spawn(Camera3dBundle {
         transform: Transform::from_xyz(-2.0, 2.5, 5.0).looking_at(Vec3::ZERO, Vec3::Y),
         ..default()

examples/3d/update_gltf_scene.rs

@@ -19,7 +19,7 @@ fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
     commands.spawn(DirectionalLightBundle {
         transform: Transform::from_xyz(4.0, 25.0, 8.0).looking_at(Vec3::ZERO, Vec3::Y),
         directional_light: DirectionalLight {
-            illuminance: 2000.0,
+            illuminance: light_consts::lux::OVERCAST_DAY,
             shadows_enabled: true,
             ..default()
         },

examples/3d/vertex_colors.rs

@@ -42,17 +42,19 @@ fn setup(
         transform: Transform::from_xyz(0.0, 0.5, 0.0),
         ..default()
     });
-    // light
+
-    commands.spawn(PointLightBundle {
+    // Light
-        point_light: PointLight {
+    commands.spawn(DirectionalLightBundle {
-            intensity: 500_000.0,
+        directional_light: DirectionalLight {
+            illuminance: light_consts::lux::OVERCAST_DAY,
             shadows_enabled: true,
             ..default()
         },
-        transform: Transform::from_xyz(4.0, 8.0, 4.0),
+        transform: Transform::from_xyz(4.0, 5.0, 4.0).looking_at(Vec3::ZERO, Vec3::Y),
         ..default()
     });
-    // camera
+
+    // Camera
     commands.spawn(Camera3dBundle {
         transform: Transform::from_xyz(-2.0, 2.5, 5.0).looking_at(Vec3::ZERO, Vec3::Y),
         ..default()

examples/3d/wireframe.rs

@@ -94,9 +94,9 @@ fn setup(
 
     // light
     commands.spawn(PointLightBundle {
-        transform: Transform::from_xyz(4.0, 8.0, 4.0),
+        transform: Transform::from_xyz(0.0, 2.0, 0.0),
         point_light: PointLight {
-            intensity: 150_000.0,
+            intensity: 2000.0,
             ..default()
         },
         ..default()

examples/animation/animated_fox.rs

@@ -8,10 +8,6 @@ use bevy::{animation::RepeatAnimation, pbr::CascadeShadowConfigBuilder, prelude:
 fn main() {
     App::new()
         .add_plugins(DefaultPlugins)
-        .insert_resource(AmbientLight {
-            color: Color::WHITE,
-            brightness: 150.0,
-        })
         .add_systems(Startup, setup)
         .add_systems(
             Update,
@@ -54,7 +50,6 @@ fn setup(
     commands.spawn(DirectionalLightBundle {
         transform: Transform::from_rotation(Quat::from_euler(EulerRot::ZYX, 0.0, 1.0, -PI / 4.)),
         directional_light: DirectionalLight {
-            illuminance: 2000.0,
             shadows_enabled: true,
             ..default()
         },

examples/animation/cubic_curve.rs

@@ -47,14 +47,12 @@ fn setup(
     ));
 
     // Some light to see something
-    commands.spawn(PointLightBundle {
+    commands.spawn(DirectionalLightBundle {
-        point_light: PointLight {
+        directional_light: DirectionalLight {
-            intensity: 1_500_000.,
-            range: 100.,
             shadows_enabled: true,
             ..default()
         },
-        transform: Transform::from_xyz(8., 16., 8.),
+        transform: Transform::from_xyz(8., 16., 8.).looking_at(Vec3::ZERO, Vec3::Y),
         ..default()
     });
 

examples/animation/morph_targets.rs

@@ -44,11 +44,7 @@ fn setup(asset_server: Res<AssetServer>, mut commands: Commands) {
         ..default()
     });
     commands.spawn(DirectionalLightBundle {
-        directional_light: DirectionalLight {
+        directional_light: DirectionalLight::default(),
-            color: Color::WHITE,
-            illuminance: 1000.0,
-            ..default()
-        },
         transform: Transform::from_rotation(Quat::from_rotation_z(PI / 2.0)),
         ..default()
     });

examples/asset/asset_loading.rs

@@ -79,12 +79,9 @@ fn setup(
         ..default()
     });
     // light
-    commands.spawn(PointLightBundle {
+    commands.spawn(DirectionalLightBundle {
-        point_light: PointLight {
+        directional_light: DirectionalLight::default(),
-            intensity: 150_000.0,
+        transform: Transform::from_xyz(4.0, 5.0, 4.0).looking_at(Vec3::ZERO, Vec3::Y),
-            ..default()
-        },
-        transform: Transform::from_xyz(4.0, 5.0, 4.0),
         ..default()
     });
     // camera

examples/asset/hot_asset_reloading.rs

@@ -27,12 +27,9 @@ fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
         ..default()
     });
     // light
-    commands.spawn(PointLightBundle {
+    commands.spawn(DirectionalLightBundle {
-        point_light: PointLight {
+        directional_light: DirectionalLight::default(),
-            intensity: 150_000.0,
+        transform: Transform::from_xyz(4.0, 5.0, 4.0).looking_at(Vec3::ZERO, Vec3::Y),
-            ..default()
-        },
-        transform: Transform::from_xyz(4.0, 5.0, 4.0),
         ..default()
     });
     // camera

examples/audio/spatial_audio_3d.rs

@@ -56,13 +56,12 @@ fn setup(
         });
 
     // light
-    commands.spawn(PointLightBundle {
+    commands.spawn(DirectionalLightBundle {
-        point_light: PointLight {
+        directional_light: DirectionalLight {
-            intensity: 1_000_000.0,
             shadows_enabled: true,
             ..default()
         },
-        transform: Transform::from_xyz(4.0, 8.0, 4.0),
+        transform: Transform::from_xyz(4.0, 8.0, 4.0).looking_at(Vec3::ZERO, Vec3::Y),
         ..default()
     });
 

examples/ecs/iter_combinations.rs

@@ -7,7 +7,7 @@ fn main() {
     App::new()
         .add_plugins(DefaultPlugins)
         .insert_resource(AmbientLight {
-            brightness: 0.03,
+            brightness: 1.0,
             ..default()
         })
         .insert_resource(ClearColor(Color::BLACK))
@@ -114,7 +114,7 @@ fn generate_bodies(
             p.spawn(PointLightBundle {
                 point_light: PointLight {
                     color: Color::WHITE,
-                    intensity: 100_000.0,
+                    intensity: 500_000.0,
                     range: 100.0,
                     radius: star_radius,
                     ..default()

examples/shader/array_texture.rs

@@ -33,20 +33,9 @@ fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
     });
 
     // light
-    commands.spawn(PointLightBundle {
+    commands.spawn(DirectionalLightBundle {
-        point_light: PointLight {
+        directional_light: DirectionalLight::default(),
-            intensity: 150_000.0,
+        transform: Transform::from_xyz(3.0, 2.0, 1.0).looking_at(Vec3::ZERO, Vec3::Y),
-            ..Default::default()
-        },
-        transform: Transform::from_xyz(-3.0, 2.0, -1.0),
-        ..Default::default()
-    });
-    commands.spawn(PointLightBundle {
-        point_light: PointLight {
-            intensity: 150_000.0,
-            ..Default::default()
-        },
-        transform: Transform::from_xyz(3.0, 2.0, 1.0),
         ..Default::default()
     });
 

examples/shader/extended_material.rs

@@ -45,11 +45,8 @@ fn setup(
 
     // light
     commands.spawn((
-        PointLightBundle {
+        DirectionalLightBundle {
-            point_light: PointLight {
+            transform: Transform::from_xyz(1.0, 1.0, 1.0).looking_at(Vec3::ZERO, Vec3::Y),
-                intensity: 150_000.0,
-                ..default()
-            },
             ..default()
         },
         Rotate,
@@ -66,12 +63,8 @@ fn setup(
 struct Rotate;
 
 fn rotate_things(mut q: Query<&mut Transform, With<Rotate>>, time: Res<Time>) {
-    for mut t in q.iter_mut() {
+    for mut t in &mut q {
-        t.translation = Vec3::new(
+        t.rotate_y(time.delta_seconds());
-            time.elapsed_seconds().sin(),
-            0.5,
-            time.elapsed_seconds().cos(),
-        ) * 4.0;
     }
 }
 

examples/shader/post_processing.rs

@@ -333,14 +333,7 @@ fn setup(
         Rotates,
     ));
     // light
-    commands.spawn(PointLightBundle {
+    commands.spawn(DirectionalLightBundle::default());
-        point_light: PointLight {
-            intensity: 150_000.0,
-            ..default()
-        },
-        transform: Transform::from_translation(Vec3::new(0.0, 0.0, 10.0)),
-        ..default()
-    });
 }
 
 #[derive(Component)]

examples/shader/shader_material_screenspace_texture.rs

@@ -29,12 +29,9 @@ fn setup(
         material: standard_materials.add(Color::rgb(0.3, 0.5, 0.3)),
         ..default()
     });
-    commands.spawn(PointLightBundle {
+    commands.spawn(DirectionalLightBundle {
-        point_light: PointLight {
+        directional_light: DirectionalLight::default(),
-            intensity: 150_000.0,
+        transform: Transform::from_xyz(4.0, 8.0, 4.0).looking_at(Vec3::ZERO, Vec3::Y),
-            ..default()
-        },
-        transform: Transform::from_xyz(4.0, 8.0, 4.0),
         ..default()
     });
 

examples/shader/shader_prepass.rs

@@ -123,13 +123,12 @@ fn setup(
     });
 
     // light
-    commands.spawn(PointLightBundle {
+    commands.spawn(DirectionalLightBundle {
-        point_light: PointLight {
+        directional_light: DirectionalLight {
-            intensity: 300_000.0,
             shadows_enabled: true,
             ..default()
         },
-        transform: Transform::from_xyz(4.0, 8.0, 4.0),
+        transform: Transform::from_xyz(4.0, 8.0, 4.0).looking_at(Vec3::ZERO, Vec3::Y),
         ..default()
     });
 

examples/stress_tests/many_cubes.rs

@@ -190,7 +190,7 @@ fn setup(
         }
     }
 
-    commands.spawn(DirectionalLightBundle { ..default() });
+    commands.spawn(DirectionalLightBundle::default());
 }
 
 fn init_textures(args: &Args, images: &mut Assets<Image>) -> Vec<Handle<Image>> {

examples/stress_tests/many_foxes.rs

@@ -65,10 +65,6 @@ fn main() {
             moving: true,
             sync: args.sync,
         })
-        .insert_resource(AmbientLight {
-            color: Color::WHITE,
-            brightness: 100.0,
-        })
         .add_systems(Startup, setup)
         .add_systems(
             Update,
@@ -203,7 +199,6 @@ fn setup(
     commands.spawn(DirectionalLightBundle {
         transform: Transform::from_rotation(Quat::from_euler(EulerRot::ZYX, 0.0, 1.0, -PI / 4.)),
         directional_light: DirectionalLight {
-            illuminance: 3000.0,
             shadows_enabled: true,
             ..default()
         },

examples/stress_tests/many_lights.rs

@@ -48,7 +48,7 @@ fn setup(
     warn!(include_str!("warning_string.txt"));
 
     const LIGHT_RADIUS: f32 = 0.3;
-    const LIGHT_INTENSITY: f32 = 5.0;
+    const LIGHT_INTENSITY: f32 = 10.0;
     const RADIUS: f32 = 50.0;
     const N_LIGHTS: usize = 100_000;
 

examples/tools/scene_viewer/main.rs

@@ -149,11 +149,7 @@ fn setup_scene_after_load(
         if !scene_handle.has_light {
             info!("Spawning a directional light");
             commands.spawn(DirectionalLightBundle {
-                directional_light: DirectionalLight {
+                transform: Transform::from_xyz(1.0, 1.0, 0.0).looking_at(Vec3::ZERO, Vec3::Y),
-                    illuminance: 3000.0,
-                    shadows_enabled: false,
-                    ..default()
-                },
                 ..default()
             });
 

examples/transforms/3d_rotation.rs

@@ -41,12 +41,8 @@ fn setup(
     });
 
     // Add a light source so we can see clearly.
-    commands.spawn(PointLightBundle {
+    commands.spawn(DirectionalLightBundle {
-        point_light: PointLight {
+        transform: Transform::from_xyz(3.0, 3.0, 3.0).looking_at(Vec3::ZERO, Vec3::Y),
-            intensity: 150_000.0,
-            ..default()
-        },
-        transform: Transform::from_translation(Vec3::ONE * 3.0),
         ..default()
     });
 }

examples/transforms/scale.rs

@@ -57,12 +57,8 @@ fn setup(
     });
 
     // Add a light source for better 3d visibility.
-    commands.spawn(PointLightBundle {
+    commands.spawn(DirectionalLightBundle {
-        point_light: PointLight {
+        transform: Transform::from_xyz(3.0, 3.0, 3.0).looking_at(Vec3::ZERO, Vec3::Y),
-            intensity: 150_000.0,
-            ..default()
-        },
-        transform: Transform::from_translation(Vec3::ONE * 3.0),
         ..default()
     });
 }

examples/transforms/transform.rs

@@ -86,12 +86,8 @@ fn setup(
     });
 
     // Add a light source for better 3d visibility.
-    commands.spawn(PointLightBundle {
+    commands.spawn(DirectionalLightBundle {
-        point_light: PointLight {
+        transform: Transform::from_xyz(3.0, 3.0, 3.0).looking_at(Vec3::ZERO, Vec3::Y),
-            intensity: 150_000.0,
-            ..default()
-        },
-        transform: Transform::from_translation(Vec3::ONE * 3.0),
         ..default()
     });
 }

examples/transforms/translation.rs

@@ -55,12 +55,8 @@ fn setup(
     });
 
     // Add a light source for better 3d visibility.
-    commands.spawn(PointLightBundle {
+    commands.spawn(DirectionalLightBundle {
-        point_light: PointLight {
+        transform: Transform::from_xyz(3.0, 3.0, 3.0).looking_at(Vec3::ZERO, Vec3::Y),
-            intensity: 150_000.0,
-            ..default()
-        },
-        transform: Transform::from_translation(Vec3::ONE * 3.0),
         ..default()
     });
 }

examples/ui/render_ui_to_texture.rs

@@ -59,14 +59,7 @@ fn setup(
     let image_handle = images.add(image);
 
     // Light
-    commands.spawn(PointLightBundle {
+    commands.spawn(DirectionalLightBundle::default());
-        point_light: PointLight {
-            intensity: 500_000.0,
-            ..default()
-        },
-        transform: Transform::from_translation(Vec3::new(0.0, 0.0, 10.0)),
-        ..default()
-    });
 
     let texture_camera = commands
         .spawn(Camera2dBundle {

examples/window/low_power.rs

@@ -156,13 +156,9 @@ pub(crate) mod test_setup {
             },
             Rotator,
         ));
-        commands.spawn(PointLightBundle {
+
-            point_light: PointLight {
+        commands.spawn(DirectionalLightBundle {
-                intensity: 1_000_000.0,
+            transform: Transform::from_xyz(1.0, 1.0, 1.0).looking_at(Vec3::ZERO, Vec3::Y),
-                shadows_enabled: true,
-                ..default()
-            },
-            transform: Transform::from_xyz(4.0, 8.0, 4.0),
             ..default()
         });
         commands.spawn(Camera3dBundle {

examples/window/multiple_windows.rs

@@ -18,12 +18,8 @@ fn setup_scene(mut commands: Commands, asset_server: Res<AssetServer>) {
         ..default()
     });
     // light
-    commands.spawn(PointLightBundle {
+    commands.spawn(DirectionalLightBundle {
-        point_light: PointLight {
+        transform: Transform::from_xyz(3.0, 3.0, 3.0).looking_at(Vec3::ZERO, Vec3::Y),
-            intensity: 150_000.0,
-            ..default()
-        },
-        transform: Transform::from_xyz(4.0, 5.0, 4.0),
         ..default()
     });
 

examples/window/screenshot.rs

@@ -47,13 +47,12 @@ fn setup(
         ..default()
     });
     // light
-    commands.spawn(PointLightBundle {
+    commands.spawn(DirectionalLightBundle {
-        point_light: PointLight {
+        directional_light: DirectionalLight {
-            intensity: 500_000.0,
             shadows_enabled: true,
             ..default()
         },
-        transform: Transform::from_xyz(4.0, 8.0, 4.0),
+        transform: Transform::from_xyz(3.0, 3.0, 3.0).looking_at(Vec3::ZERO, Vec3::Y),
         ..default()
     });
     // camera