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Maniphest T52266

Principled Shader, Smooth Shading and Material view bug
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Description

System Information
Windows 10 64 bit with 8 GB RAM
Nvidia GeForce 840M, 2 GB

Blender Version
2.79 RC1

Short description of error
After using Principled Shader and Smooth shading, The material view does not work correctly as it shows weird shape. Please check attached image. Image is self-explanatory.

Exact steps for others to reproduce the error

  1. Use 'Principled' Shader on cube which comes with startup file.
  2. Change shading to 'Smooth'.
  3. Change view mode to 'Material'. It will show distorted object.

Event Timeline

Sumit Chaudhary (code.sumit) created this task.Aug 5 2017, 6:01 AM
Ivan Koziichuk (J.kozz) added a subscriber: Ivan Koziichuk (J.kozz).Aug 7 2017, 2:40 PM

Don't work in a version 2.78c too.

Bastien Montagne (mont29) lowered the priority of this task from 90 to Normal.Aug 8 2017, 12:35 PM
Bastien Montagne (mont29) added a project: Cycles.
Bastien Montagne (mont29) added subscribers: Sergey Sharybin (sergey), Brecht Van Lommel (brecht), Bastien Montagne (mont29).

Not sure who would handle that, maybe @Sergey Sharybin (sergey) or @Brecht Van Lommel (brecht)?

Brecht Van Lommel (brecht) changed the task status from Unknown Status to Unknown Status.Aug 8 2017, 12:45 PM
Brecht Van Lommel (brecht) claimed this task.

The same issue happens in Cycles when using a similar light setup of sharp sun lights. The normals and the actual geometry are too different to give good results.

It might be possible to improve something here, but this entire viewport shading is being rewritten for 2.8x and I don't think it's worth trying to improve the existing one further.

Ivan Koziichuk (J.kozz) added a comment.Aug 10 2017, 10:53 AM

Maybe, but we can't render low poly objects normally. It's too long for waiting for 2.8x version. Please, fix this. For some people, it's not a bug, but for game developers - it's HUGE problem.