From dd07eba5616e3c8c1473f6c99cf8bdc40a6fbd53 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ma=CC=81te=CC=81=20Homolya?= <mate.homolya@gmail.com>
Date: Sun, 13 Jul 2025 10:16:23 -0700
Subject: [PATCH] Handle unallocated GPU memory for mesh extraction

---
 crates/bevy_pbr/src/render/mesh.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/crates/bevy_pbr/src/render/mesh.rs b/crates/bevy_pbr/src/render/mesh.rs
index 9795d442dd..005c730571 100644
--- a/crates/bevy_pbr/src/render/mesh.rs
+++ b/crates/bevy_pbr/src/render/mesh.rs
@@ -1098,7 +1098,11 @@ impl RenderMeshInstanceGpuBuilder {
                     mesh_vertex_slice.range.start,
                     mesh_vertex_slice.range.end - mesh_vertex_slice.range.start,
                 ),
-                None => (0, 0),
+                None => {
+                    // GPU memory for this mesh hasn't been allocated yet. Retry next frame.
+                    meshes_to_reextract_next_frame.insert(entity);
+                    return None;
+                }
             };
         let (mesh_is_indexed, first_index_index, index_count) =
             match mesh_allocator.mesh_index_slice(&self.shared.mesh_asset_id) {