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Third Party Issue
Third Party Issue in 2023.3.X
Votes
0
Found in
2021.3.31f1
2022.3.11f1
2023.1.17f1
2023.2.0b14
2023.3.0a10
Issue ID
UUM-53923
Regression
No
Compute Shader doesn't seam terrains together when running Editor with Nvidia and Intel GPUs
Reproduction steps:
1. Open the attached “BugRepro” project
2. Open the “Assets/Simple.unity“ scene
3. In the Scene View, fly around and observe the terrain
Expected result: Terrain GameObjects are seamed together
Actual result: Terrain GameObjects are not seamed together and have gaps between them
Reproducible with: 2021.3.31f1, 2022.3.11f1, 2023.1.17f1, 2023.2.0b14, 2023.3.0a10
Reproducible on: Ubuntu 23.10 (Nvidia, Intel), Ubuntu 22.04 (Nvidia), Windows(Nvidia, glCore)
Not reproducible on: Ubuntu 22.04 (AMD), Windows 10 Pro 22H2
Notes:
- With OpenGL set as Graphics API, this issue is reproduced with Nvidia and Intel GPUs
- With Vulkan set as Graphics API, this issue is reproduced only with Intel GPU
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Resolution Note:
GPU drivers bug mixed with faulty user's compute shader:
On NVidia running OpenGL, compute shader fails to load+store R16_UNorm texture. User's compute shader uses RWTexture2D<float4>format which is not compatible with R16.
Workaround: R16_SFloat seems to work. Or avoid reading and writing the same texture in compute shader.
Resolution Note (2023.3.X):
GPU drivers bug mixed with faulty user's compute shader:
On NVidia running OpenGL, compute shader fails to load+store R16_UNorm texture. User's compute shader uses RWTexture2D<float4>format which is not compatible with R16.
Workaround: R16_SFloat seems to work. Or avoid reading and writing the same texture in compute shader.