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Third Party Issue
Votes
0
Found in
6000.0.54f1
6000.1.12f1
6000.2.0b10
6000.3.0a2
Issue ID
UUM-111493
Regression
Yes
GameObjects are not rendered when using a fragment shader with RWStructuredBuffer in URP
How to reproduce:
1. Open the “IN-107509“ project
2. Open the “Main” Scene
3. Enter Play Mode
4. Observe the Game view
Expected result: GameObjects are visible
Actual result: GameObjects are not visible
Reproducible with: 2023.3.0a19, 6000.0.54f1, 6000.1.12f1, 6000.2.0b10, 6000.3.0a2
Not reproducible with: 2023.3.0a18
Reproducible on: Windows 10
Not reproducible on: macOS 15.5 (M1 Max)
Note: Reproducible with DirectX11, DirectX12 and Vulkan Graphics API
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Resolution Note:
The user code in the test project uses RWStructuredBuffer (UAV) and read back the values to CPU. At startup, they call Graphics.SetRandomWriteTarget once. This assumes that nothing calls Graphics.ClearRandomWriteTargets, so before it only worked by chance. Now the RenderGraph system internally calls this function, which broke the user code.
In order to fix it, you should call Graphics.SetRandomWriteTarget every time before calling Graphics.DrawProceduralNow. You should also call Graphics.ClearRandomWriteTargets afterwards to avoid affecting other systems.
See documentation: https://docs.unity3d.com/ScriptReference/Graphics.SetRandomWriteTarget.html