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Principled Shader Roughness differs from Linux/OSX to Windows 10
Closed, ResolvedPublic


System Information
Xubuntu 14.04 / OSX 10.11.6 / Windows 10

Blender Version
Broken: all tested Windows 10 64bit builds till today

Short description of error
While under linux and OSX squared roughness values are used in the Principled BDSF, Windows builds use unsquared values.

Exact steps for others to reproduce the error
Just build a nice glossy Material and render it on different Operation Systems.



Event Timeline

Brecht Van Lommel (brecht) triaged this task as Needs Information from User priority.

Are you absolutely sure you compared the same .blend file on different operating systems, with the same blender version? This seems like a very unlikely bug to happen only on some operating systems. Note that the Principled BSDF and Glossy BSDF use a different roughness.

ronald engel (ronald8e) closed this task as Resolved.Jul 18 2017, 9:40 AM
ronald engel (ronald8e) claimed this task.

We figured it out - its a problem with file paths. We use textures (which affect roughness) linked from different volumes. So .blend files saved in one OS dont work well when opened in another OS. I guess we had to change the way where we store our textures ... should be at least on the same volume so that relative paths will work.

Sorry for the wrong bug report and thanks for the fast reply!