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SSS polygon boundary artifacts with volume absorption #113461

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opened 2023-10-09 21:59:26 +02:00 by Christopher Tyler · 1 comment
Christopher Tyler commented 2023-10-09 21:59:26 +02:00
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System Information
Operating system: macOS-13.4.1-arm64-arm-64bit 64 Bits
Graphics card: Metal API Apple M1 Pro 1.2

Blender Version
Broken: version: 4.0.0 Beta, branch: blender-v4.0-release, commit date: 2023-10-08 20:18, hash: 49c62e8e164c
Worked: (newest version of Blender that worked as expected)

Short description of error
[If material uses subsurface scattering, and also has a volume absorption, there are strong polygon boundary artifacts]

Exact steps for others to reproduce the error
[Create a material with SSS. Then also attach a volume absorption to the material output to get the artifacts.]

**System Information** Operating system: macOS-13.4.1-arm64-arm-64bit 64 Bits Graphics card: Metal API Apple M1 Pro 1.2 **Blender Version** Broken: version: 4.0.0 Beta, branch: blender-v4.0-release, commit date: 2023-10-08 20:18, hash: `49c62e8e164c` Worked: (newest version of Blender that worked as expected) **Short description of error** [If material uses subsurface scattering, and also has a volume absorption, there are strong polygon boundary artifacts] **Exact steps for others to reproduce the error** [Create a material with SSS. Then also attach a volume absorption to the material output to get the artifacts.]
SSS Artifacts 02.jpg
564 KiB
SSS Artifacts 01.jpg
718 KiB
SSS Artifacts.zip
1.7 MiB
SSS Artifacts 02.jpg SSS Artifacts 01.jpg
Christopher Tyler added the
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 labels 2023-10-09 21:59:27 +02:00
Germano Cavalcante commented 2023-10-09 23:56:09 +02:00
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I can confirm the problem.
It seems triggered by the unused liquid material in the glass.
It doesn't happen in Blender 3.6.4 so it's a regression.

Here is a simplified file:

I can confirm the problem. It seems triggered by the unused liquid material in the glass. It doesn't happen in Blender 3.6.4 so it's a regression. Here is a simplified file:
Milk Simplified.blend
1.1 MiB
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 labels 2023-10-11 21:14:26 +02:00
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Reference: blender/blender#113461
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