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Werid stains appear when painting normal

Community Beginner ,
Oct 04, 2023 Oct 04, 2023

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I was painting the normal and tried to fix some baking errors on my mesh in SP. I tried this method before, and it works pretty well. Then, I noticed that whenever I paint over the mesh, some weird stains appear on the surface, or I call them specks of dirt. How should I fix it?

Screenshot 2023-10-04 100712.pngScreenshot 2023-10-04 100747.pngScreenshot 2023-10-04 100814.pngScreenshot 2023-10-04 101548.pngScreenshot 2023-10-04 101620.png

Bug Unresolved
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Bugs & Crashes

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3 Comments
Adobe Employee ,
Oct 04, 2023 Oct 04, 2023

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Hi @Kalyingj,

 

My first guess would be an issue related to the UVs. Can I have a look at those? Also, what's your GPU?

 

Let me know.

 

Cyril Dellenbach (Micro) | QA Support Artist | Adobe

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Community Beginner ,
Oct 09, 2023 Oct 09, 2023

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Hi @Cyril Dellenbach ,

Thank you for replying, below are the UV screenshots from Blender and SP, and the GPU I'm using is AMD Radeon RX 6800M.

UV.blend.pngUV_blender2.pngScreenshot 2023-10-09 130949.pngScreenshot 2023-10-09 131010.pngRegards

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Adobe Employee ,
Oct 10, 2023 Oct 10, 2023

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Thanks for the details.

 

Some of the UVs are really small, so depending on the Texture set resolution (1024, 2048, etc.) and the margin between the UV islands, artifacts may appear.

 

With that being said, your issue is probably related to your GPU. The latest AMD drivers updates unfortunately have compatibility issues with Substance 3D Painter. Therefore, I advise you to first disable the Sparse Virtual Texturing (Edit > Settings > General > Sparse Virtual Texturing > Hardware support acceleration), and if it doesn't help, rollback the GPU driver version for a previous one.

 

Best regards,

 

Cyril Dellenbach (Micro) | QA Support Artist | Adobe

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