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Emerson Coskey 81a25bb0c7
Procedural atmospheric scattering (#16314) 
Implement procedural atmospheric scattering from [Sebastien Hillaire's
2020 paper](https://sebh.github.io/publications/egsr2020.pdf). This
approach should scale well even down to mobile hardware, and is
physically accurate.

## Co-author: @mate-h 

He helped massively with getting this over the finish line, ensuring
everything was physically correct, correcting several places where I had
misunderstood or misapplied the paper, and improving the performance in
several places as well. Thanks!

## Credits

@aevyrie: helped find numerous bugs and improve the example to best show
off this feature :)

Built off of @mtsr's original branch, which handled the transmittance
lut (arguably the most important part)

## Showcase: 


![sunset](https://github.com/user-attachments/assets/2eee1f38-f66d-4772-bb72-163e13c719d8)

![twilight](https://github.com/user-attachments/assets/f7d358b6-898d-4df7-becc-188cd753102d)


## For followup

- Integrate with pcwalton's volumetrics code
- refactor/reorganize for better integration with other effects
- have atmosphere transmittance affect directional lights
- add support for generating skybox/environment map

---------

Co-authored-by: Emerson Coskey <56370779+EmersonCoskey@users.noreply.github.com>
Co-authored-by: atlv <email@atlasdostal.com>
Co-authored-by: JMS55 <47158642+JMS55@users.noreply.github.com>
Co-authored-by: Emerson Coskey <coskey@emerlabs.net>
Co-authored-by: Máté Homolya <mate.homolya@gmail.com>
2025-01-23 22:52:46 +00:00
..
3d_scene.rs Migrate cameras to required components (#15641) 2024-10-05 01:59:52 +00:00
3d_shapes.rs Merge Style properties into Node. Use ComputedNode for computed properties. (#15975) 2024-10-18 22:25:33 +00:00
3d_viewport_to_world.rs Migrate from Query::single and friends to Single (#15872) 2024-10-13 20:32:06 +00:00
animated_material.rs aligning public apis of Time,Timer and Stopwatch (#15962) 2024-10-16 21:09:32 +00:00
anisotropy.rs Merge Style properties into Node. Use ComputedNode for computed properties. (#15975) 2024-10-18 22:25:33 +00:00
anti_aliasing.rs Don't reëxport bevy_image from bevy_render (#16163) 2024-11-10 06:54:38 +00:00
atmosphere.rs Procedural atmospheric scattering (#16314) 2025-01-23 22:52:46 +00:00
atmospheric_fog.rs Merge Style properties into Node. Use ComputedNode for computed properties. (#15975) 2024-10-18 22:25:33 +00:00
auto_exposure.rs Introduce support for mixed lighting by allowing lights to opt out of contributing diffuse light to lightmapped objects. (#16761) 2024-12-16 23:48:33 +00:00
blend_modes.rs Allow clippy::too_many_arguments to lint without warnings (#17249) 2025-01-09 07:26:15 +00:00
bloom_3d.rs Anamorphic Bloom (#17096) 2025-01-06 18:43:21 +00:00
camera_sub_view.rs simplify example, replace get_single to Single Query (#16187) 2024-11-01 18:25:42 +00:00
clearcoat.rs Don't reëxport bevy_image from bevy_render (#16163) 2024-11-10 06:54:38 +00:00
color_grading.rs Relationships (non-fragmenting, one-to-many) (#17398) 2025-01-18 22:20:30 +00:00
decal.rs Forward decals (port of bevy_contact_projective_decals) (#16600) 2025-01-15 02:31:30 +00:00
deferred_rendering.rs Allow clippy::too_many_arguments to lint without warnings (#17249) 2025-01-09 07:26:15 +00:00
depth_of_field.rs Merge Style properties into Node. Use ComputedNode for computed properties. (#15975) 2024-10-18 22:25:33 +00:00
fog_volumes.rs Deprecate SpatialBundle (#15830) 2024-10-13 17:28:22 +00:00
fog.rs Merge Style properties into Node. Use ComputedNode for computed properties. (#15975) 2024-10-18 22:25:33 +00:00
generate_custom_mesh.rs Merge Style properties into Node. Use ComputedNode for computed properties. (#15975) 2024-10-18 22:25:33 +00:00
irradiance_volumes.rs Introduce support for mixed lighting by allowing lights to opt out of contributing diffuse light to lightmapped objects. (#16761) 2024-12-16 23:48:33 +00:00
lighting.rs Introduce support for mixed lighting by allowing lights to opt out of contributing diffuse light to lightmapped objects. (#16761) 2024-12-16 23:48:33 +00:00
lightmaps.rs Higher quality bicubic lightmap sampling (#16740) 2025-01-12 05:40:30 +00:00
lines.rs Migrate cameras to required components (#15641) 2024-10-05 01:59:52 +00:00
load_gltf_extras.rs Merge Style properties into Node. Use ComputedNode for computed properties. (#15975) 2024-10-18 22:25:33 +00:00
load_gltf.rs aligning public apis of Time,Timer and Stopwatch (#15962) 2024-10-16 21:09:32 +00:00
mesh_ray_cast.rs Rename RayCastSettings to MeshRayCastSettings (#16703) 2024-12-10 03:27:42 +00:00
meshlet.rs Add external assets to .gitignore (#17388) 2025-01-17 01:20:14 +00:00
mixed_lighting.rs Parent -> ChildOf (#17427) 2025-01-20 22:13:29 +00:00
motion_blur.rs Introduce support for mixed lighting by allowing lights to opt out of contributing diffuse light to lightmapped objects. (#16761) 2024-12-16 23:48:33 +00:00
order_independent_transparency.rs Relationships (non-fragmenting, one-to-many) (#17398) 2025-01-18 22:20:30 +00:00
orthographic.rs Improve API for scaling orthographic cameras (#15969) 2024-10-17 17:50:06 +00:00
parallax_mapping.rs Don't reëxport bevy_image from bevy_render (#16163) 2024-11-10 06:54:38 +00:00
parenting.rs aligning public apis of Time,Timer and Stopwatch (#15962) 2024-10-16 21:09:32 +00:00
pbr.rs Fix confusing comment in pbr example (#16996) 2024-12-29 22:45:17 +00:00
pcss.rs Merge Style properties into Node. Use ComputedNode for computed properties. (#15975) 2024-10-18 22:25:33 +00:00
post_processing.rs Merge Style properties into Node. Use ComputedNode for computed properties. (#15975) 2024-10-18 22:25:33 +00:00
query_gltf_primitives.rs Cosmetic tweaks to query_gltf_primitives (#16102) 2024-10-27 19:06:19 +00:00
reflection_probes.rs Merge Style properties into Node. Use ComputedNode for computed properties. (#15975) 2024-10-18 22:25:33 +00:00
render_to_texture.rs aligning public apis of Time,Timer and Stopwatch (#15962) 2024-10-16 21:09:32 +00:00
rotate_environment_map.rs Don't reëxport bevy_image from bevy_render (#16163) 2024-11-10 06:54:38 +00:00
scrolling_fog.rs Don't reëxport bevy_image from bevy_render (#16163) 2024-11-10 06:54:38 +00:00
shadow_biases.rs Merge Style properties into Node. Use ComputedNode for computed properties. (#15975) 2024-10-18 22:25:33 +00:00
shadow_caster_receiver.rs Migrate cameras to required components (#15641) 2024-10-05 01:59:52 +00:00
skybox.rs Introduce support for mixed lighting by allowing lights to opt out of contributing diffuse light to lightmapped objects. (#16761) 2024-12-16 23:48:33 +00:00
spherical_area_lights.rs Migrate cameras to required components (#15641) 2024-10-05 01:59:52 +00:00
split_screen.rs Rename TargetCamera to UiTargetCamera (#17403) 2025-01-19 19:56:57 +00:00
spotlight.rs Merge Style properties into Node. Use ComputedNode for computed properties. (#15975) 2024-10-18 22:25:33 +00:00
ssao.rs Merge Style properties into Node. Use ComputedNode for computed properties. (#15975) 2024-10-18 22:25:33 +00:00
ssr.rs Allow clippy::too_many_arguments to lint without warnings (#17249) 2025-01-09 07:26:15 +00:00
texture.rs Migrate cameras to required components (#15641) 2024-10-05 01:59:52 +00:00
tonemapping.rs Move hashbrown and foldhash out of bevy_utils (#17460) 2025-01-23 16:46:08 +00:00
transmission.rs Allow clippy::too_many_arguments to lint without warnings (#17249) 2025-01-09 07:26:15 +00:00
transparency_3d.rs aligning public apis of Time,Timer and Stopwatch (#15962) 2024-10-16 21:09:32 +00:00
two_passes.rs Migrate cameras to required components (#15641) 2024-10-05 01:59:52 +00:00
update_gltf_scene.rs aligning public apis of Time,Timer and Stopwatch (#15962) 2024-10-16 21:09:32 +00:00
vertex_colors.rs Migrate cameras to required components (#15641) 2024-10-05 01:59:52 +00:00
visibility_range.rs Parent -> ChildOf (#17427) 2025-01-20 22:13:29 +00:00
volumetric_fog.rs Merge Style properties into Node. Use ComputedNode for computed properties. (#15975) 2024-10-18 22:25:33 +00:00
wireframe.rs Merge Style properties into Node. Use ComputedNode for computed properties. (#15975) 2024-10-18 22:25:33 +00:00