Cycles: GPU Denoising breaks the UI and doesn't abort #120167
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Reference: blender/blender#120167
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System Information
Operating system: Windows-11-10.0.22631-SP0 64 Bits
Graphics card: NVIDIA RTX 2000 Ada Generation Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 551.86
Blender Version
Broken: version: 4.1.0, branch: blender-v4.1-release, commit date: 2024-03-25 20:42, hash:
40a5e739e270
Worked: (newest version of Blender that worked as expected)
Short description of error
The UI breaks sometimes. And the render doesn't abort if it is clearly broken.
Exact steps for others to reproduce the error
There are some errors in the console:
If I then try to render a second time, I get this error:
The VRAM from the previous frame wasn't freed, so I am now out of GPU memory.
I can confirm.
This appears to be a case of Blender running out of memory, but the image resolution doesn't seem to be that extreme for that.
Possibly related to one of these other reports:
#104966: OptiX Denoiser fails with large output resolution (final rendering completely black)
#78505: OptiX Denoiser crashes OPTIX_ERROR_CUDA_ERROR in optixDenoiserComputeMemoryResources
#117112: Cycles crash on CPU denoise with old gpu driver
I don't think the issue is Cycles only since the UI breaks as well.
Blender 4.1.0
Ubuntu 23.10 x86_64 + Intel repo drivers
i5-12400F
ARC A750
64GB of ram
I got a little different outcome with Intel ARC A750 on linux
Screenshot is with Denosing checked Vram used 1463M, without it checked Vram used 1200M both times the rendering stops but Blender seems ok.
I did close and open blender with each test
oneAPI kernel "integrator_shade_surface" execution error: got runtime exception "Native API failed. Native API returns: -6 (PI_ERROR_OUT_OF_HOST_MEMORY) -6
I'm going to post this and see what happens with CPU only rendering.
With CPU only rendering my whole computer locked up hard about the same spot, peak ram used was only ~250M on the rendering screen before I had to force a reset.
@aafra this might be an interesting report for you. I tried to go out of VRAM but didn't succeed.