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denoising artifacts with normal mapping in diffuse
Closed, ResolvedPublic

Description

System Information
win8.1 - Nvidia geforce 940m - intelgraphics5500

Blender Version
Broken: 2.79 5bd8ac9
Worked: (optional)

Short description of error
denoising creates artifacts when I put directly node mapping\normal in diffuse

Exact steps for others to reproduce the error
this is the file


play render whit denoising actived -> render with error
play render without denoising -> render ok
play render whit denoising actived and node "hue saturation value" between mapping and diffuse -> render ok

Event Timeline

Quite sure the denoising artifacts are from negative values, same as using musgrave texture as diffuse color
https://blenderartists.org/forum/showthread.php?441890-Strange-artifacts-with-Musgrave-texture

I can't test with GPU but when rendering with CPU, I'm not getting as severe artifacts as shown here
https://blenderartists.org/forum/showthread.php?442472-Denoising-artifacts-with-random-colors&p=3267329&viewfull=1#post3267329

mine:


If it is with the same settings.

Figured out the difference. I was using an old development build from 18.8. which gave different result with denoising. Removing negative values before rendering fixes denoising in all of them
Ubuntu 14.04 64bit, gnome 3 fallback, nvidia graphics. Rendered with cpu, 32x32 tile size.

Blender 2.79 release 5bd8ac9abfa

Blender 2.79 build from 18.8. 7b397cdfc81

Blender 2.79.1 latest build bb30ce0f0bf