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Vulkan: EEVEE Rendering artifacts on AMD GPU #129265

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opened 2024-10-20 09:06:27 +02:00 by Alaska · 3 comments
Alaska commented 2024-10-20 09:06:27 +02:00
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System Information
Operating system: Windows-10-10.0.26100-SP0 64 Bits
Graphics card: AMD Radeon RX 7800 XT Advanced Micro Devices AMD proprietary driver 24.9.1 (LLPC)

Blender Version
Broken: version: 4.3.0 Beta, branch: blender-v4.3-release, commit date: 2024-10-19 11:43, hash: cf3a6697d2eb
Worked: 4.2 as it did not expose the Vulkan option

Short description of error
When using the EEVEE rendered viewport with the Vulkan backend on a AMD GPU, there are rendering artifacts. See attacted video.

I could not reproduce the issue on my NVIDIA or Intel GPU.

Exact steps for others to reproduce the error

  1. On a AMD GPU (probably with the proprietary GPU drivers if you're on linux)
  2. Open Blender
  3. Enable the Vulkan backend
  4. Enter EEVEE rendered viewport and move around, noticing the artifacts.
**System Information** Operating system: Windows-10-10.0.26100-SP0 64 Bits Graphics card: AMD Radeon RX 7800 XT Advanced Micro Devices AMD proprietary driver 24.9.1 (LLPC) **Blender Version** Broken: version: 4.3.0 Beta, branch: blender-v4.3-release, commit date: 2024-10-19 11:43, hash: `cf3a6697d2eb` Worked: 4.2 as it did not expose the Vulkan option **Short description of error** When using the EEVEE rendered viewport with the Vulkan backend on a AMD GPU, there are rendering artifacts. See attacted video. I could not reproduce the issue on my NVIDIA or Intel GPU. **Exact steps for others to reproduce the error** 1. On a AMD GPU (probably with the proprietary GPU drivers if you're on linux) 2. Open Blender 3. Enable the Vulkan backend 4. Enter EEVEE rendered viewport and move around, noticing the artifacts.
AMD Vulkan Artifacts.mp4
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Alaska added the
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Normal
 labels 2024-10-20 09:06:28 +02:00
Pratik Borhade commented 2024-10-21 05:20:18 +02:00
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cc @Jeroen-Bakker

cc @Jeroen-Bakker
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 label 2024-10-21 05:20:32 +02:00
Jeroen Bakker commented 2024-11-05 08:40:15 +01:00
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Depth testing

First inspection it seems like a depth test precision issue. The depth test can fail for pixels even when using the same matrix/vertex shader/input data. leading to only calculate a part of the pixels it would need to calculate. I have only been able to reproduce this on Windows/AMD drivers.

When disabling optimizing the shader would fix the depth testing.

Stencil clearing

It seems like the stencil buffer in EEVEE isn't cleared on these devices. The command that is executed for other platforms, just isn't there.

**Depth testing** First inspection it seems like a depth test precision issue. The depth test can fail for pixels even when using the same matrix/vertex shader/input data. leading to only calculate a part of the pixels it would need to calculate. I have only been able to reproduce this on Windows/AMD drivers. *When disabling optimizing the shader would fix the depth testing.* **Stencil clearing** It seems like the stencil buffer in EEVEE isn't cleared on these devices. The command that is executed for other platforms, just isn't there.
Pratik Borhade commented 2024-11-05 09:28:22 +01:00
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Will label this as confirmed then?

Will label this as confirmed then?
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Viewport & EEVEE
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 labels 2024-11-05 09:30:06 +01:00
Jeroen Bakker added this to the 4.3 milestone 2024-11-05 12:19:23 +01:00
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 labels 2024-11-05 12:44:56 +01:00
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