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Cycles Glass BSDF broken on GPU
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Description

I find that with the current master branch Glass Shaders do not work, but only on GPU. Appearance is mostly black, except for higher IORs (like >2), then something lighter appears, but completely different than with CPU render. I could bisect the bug down to commit 095a01a73a35d3af57573fc724d381bcca019f54, but I didn't figure out why this change should have an effect only on GPU.

GPU is GTX1080 on Linux 4.16.2 with CUDA 9.2.88.1.

Blend File:

Details

Type
Bug

Event Timeline

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

Please use the new bug report template and provide all the requested information:
https://developer.blender.org/maniphest/task/edit/form/1/

Particularly GPU, operating system and .blend file are important.

Okay, sure. Blend file and info OS/Hardware find above. To be precise about versions:

Not working:

  • Arch distro package 17:2.79.b.git2.0385b33f-15 (Splash screen hash 0385b33f0b3)
  • source rebuild of 815b1f24fa298784d9204b9248bc69ceb2b3d762
  • source rebuild of 095a01a73a35d3af57573fc724d381bcca019f54

Working:

  • source rebuild of b3afc8917cdeaa98ebfa3f2aa17e8c5a69fdb1e3
Bastien Montagne (mont29) raised the priority of this task from Needs Information from User to Normal.Jul 12 2018, 11:55 AM
Brecht Van Lommel (brecht) closed this task as Resolved.Mar 1 2019, 5:46 AM
Brecht Van Lommel (brecht) claimed this task.

This should be solved by now, we fixed a bug exactly like this.