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Weird artefacts from emission surface #112282

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opened 2023-09-12 14:33:58 +02:00 by Nathaniel · 5 comments
Nathaniel commented 2023-09-12 14:33:58 +02:00
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System Information
Operating system: MacOS 12.6.5
Graphics card: AMD Radeon Pro 5500M (but this occurs also on CPU)

Blender Version
Broken: 3.6.2
Worked: don't know

Short description of error

In the attached .blend file I have set up an emission shader to emit light from one end of a long thin surface. The screenshot illustrates the problem: a bunch of weird artefacts appear.

If I change it to emit from the other end of the surface, by swapping the 'Map Range' node in the screenshot for the disconnected one, the problem goes away.

image

Exact steps for others to reproduce the error

Load the attached .blend file and switch the view to rendered.

**System Information** Operating system: MacOS 12.6.5 Graphics card: AMD Radeon Pro 5500M (but this occurs also on CPU) **Blender Version** Broken: 3.6.2 Worked: don't know **Short description of error** In the attached .blend file I have set up an emission shader to emit light from one end of a long thin surface. The screenshot illustrates the problem: a bunch of weird artefacts appear. If I change it to emit from the other end of the surface, by swapping the 'Map Range' node in the screenshot for the disconnected one, the problem goes away. ![image](/attachments/1e39a46c-ccc2-459e-a6af-8636c8dfd8a9) **Exact steps for others to reproduce the error** Load the attached .blend file and switch the view to rendered.
image.png
1.6 MiB
emission debug test.blend
938 KiB
Nathaniel added the
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 labels 2023-09-12 14:33:58 +02:00
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 label 2023-09-12 14:44:25 +02:00
Richard Antalik commented 2023-09-12 19:03:35 +02:00
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Can't reproduce on
Operating system: macOS-13.4-x86_64-i386-64bit 64 Bits
Graphics card: Metal API AMD Radeon Pro 5700 XT 1.2

Can't reproduce on Operating system: macOS-13.4-x86_64-i386-64bit 64 Bits Graphics card: Metal API AMD Radeon Pro 5700 XT 1.2
Richard Antalik commented 2023-09-12 19:07:36 +02:00
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Sorry, just checked with 3.6 and I was able to reproduce the issue, but not with 4.0. Please check if this issue happens with alpha build from https://builder.blender.org/download/daily/

Sorry, just checked with 3.6 and I was able to reproduce the issue, but not with 4.0. Please check if this issue happens with alpha build from https://builder.blender.org/download/daily/
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 labels 2023-09-12 19:07:46 +02:00
Iliya Katushenock commented 2023-09-12 20:41:33 +02:00
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Also can't reproduce.

System Information Operating system: Windows-10-10.0.19045-SP0 64 Bits

Graphics card: NVIDIA GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 527.56

Also can't reproduce. <details> <summary> System Information </summary> Operating system: Windows-10-10.0.19045-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 527.56 </details>
Nathaniel commented 2023-09-30 08:49:19 +02:00
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I confirm it doesn't happen in 4.0 beta. (I assume it won't happen in 4.10 alpha either in that case, but if you'd like me to check let me know).

I'm sorry for not checking the alpha before posting, and also sorry for the late reply. Next time I'll check the latest alpha before posting.

I confirm it doesn't happen in 4.0 beta. (I assume it won't happen in 4.10 alpha either in that case, but if you'd like me to check let me know). I'm sorry for not checking the alpha before posting, and also sorry for the late reply. Next time I'll check the latest alpha before posting.
Pratik Borhade added
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 labels 2023-10-23 08:25:39 +02:00
Pratik Borhade added this to the 3.6 LTS milestone 2023-10-23 08:25:45 +02:00
Lukas Stockner commented 2024-03-07 23:22:59 +01:00
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This is fixed in 3.6 LTS now, probably since 3.6.7 due to the backporting of the #110183 fix.

As it's also fixed in 4.0 and newer, this can be closed I think.

This is fixed in 3.6 LTS now, probably since 3.6.7 due to the backporting of the #110183 fix. As it's also fixed in 4.0 and newer, this can be closed I think.
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Reference: blender/blender#112282
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