Artifacts created in Cycles render when object set to Shade Auto Smooth #109573

New Issue

Bryce-Witcher · 2023-07-01T00:22:08+02:00

Bryce-Witcher commented

2023-07-01 00:22:08 +02:00

System Information
Operating system: Windows-10-10.0.22621-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3080 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.74

Blender Version
Broken: version: 3.6.0, branch: blender-v3.6-release, commit date: 2023-06-27 08:08, hash: c7fc78b81ecb
Worked: (newest version of Blender that worked as expected)

Short description of error
Artifacts created in Cycles render when object set to Shade Auto Smooth

Exact steps for others to reproduce the error
[Please describe the exact steps needed to reproduce the issue]

Render frame 37 of the Blend file. The object Gold Leaf.003 is set to Shade Auto Smooth. Your render will look like my example: Frame-37-Using-Shade-Auto-Smooth.png.
Now, set that object to Shade Smooth and re-render frame 37. It will be clean.

[Based on the default startup or an attached .blend file (as simple as possible)]

**System Information** Operating system: Windows-10-10.0.22621-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3080 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.74 **Blender Version** Broken: version: 3.6.0, branch: blender-v3.6-release, commit date: 2023-06-27 08:08, hash: `c7fc78b81ecb` Worked: (newest version of Blender that worked as expected) **Short description of error** Artifacts created in Cycles render when object set to Shade Auto Smooth **Exact steps for others to reproduce the error** [Please describe the exact steps needed to reproduce the issue] Render frame 37 of the Blend file. The object Gold Leaf.003 is set to Shade Auto Smooth. Your render will look like my example: Frame-37-Using-Shade-Auto-Smooth.png. Now, set that object to Shade Smooth and re-render frame 37. It will be clean. [Based on the default startup or an attached .blend file (as simple as possible)]

Bryce-Witcher added the

labels 2023-07-01 00:22:08 +02:00

Iliya Katushenock commented

2023-07-01 00:35:20 +02:00

Hey, thanks for report. Did you attach example file to reproduce?

hannah-jennings commented

2023-07-02 23:19:06 +02:00

I had the same issue. I think this might be related to the MSVC 17.6 codegen bug.
96867a713b
I think that most of the tests that fail use auto smooth.

The cmake file won't let you build with 17.6 and I thought I had set it to use 17.5, at least enough to get past the warning but it seems like somewhere along the line it still builds with the most recent version you have installed. If you compiled blender yourself maybe you did the same thing as me? In the end I just uninstalled everything and used the 17.7 preview instead, which fixes the problem.

Sorry if i'm completely wrong.

I had the same issue. I think this might be related to the MSVC 17.6 codegen bug. https://projects.blender.org/blender/blender/commit/96867a713bc22bbfc43f336a2d437cfbfa6d7532 I think that most of the tests that fail use auto smooth. The cmake file won't let you build with 17.6 and I thought I had set it to use 17.5, at least enough to get past the warning but it seems like somewhere along the line it still builds with the most recent version you have installed. If you compiled blender yourself maybe you did the same thing as me? In the end I just uninstalled everything and used the 17.7 preview instead, which fixes the problem. Sorry if i'm completely wrong.

Iliya Katushenock added the

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Artifacts created in Cycles render when object set to Shade Auto Smooth #109573