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Maniphest T71343

My GPU and the new Principled Shader
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Description

System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 680/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 441.08

Blender Version
Broken: version: 2.80 (sub 75), branch: octane2019, commit date: 2019-09-28 20:52, hash: rB0cfcf0f74f76
Worked: (optional)

Short description of error
[Please fill out a short description of the error here]

Exact steps for others to reproduce the error
[Please describe the exact steps needed to reproduce the issue]
[Based on the default startup or an attached .blend file (as simple as possible)]

I wrote to you to tell you that the GTX680 in my machine wasn't working with Octane. I have also had a problem getting the transmision slider to work when in Cycles while also using the GPU for rendering. As you know the transmision slider does nothing when the 'Metalic' slider is in use so I turn it off the set a value of 1.450 in the IOR and set the Transmision slider all the way up and that should give me Glass. However when using the GPU I get a really knarly looking black mess. OK that sounds like my GPU again. HOWEVER! when I take the new Principled BSDF shader out of the node tree alltogether and replace it with a simple Glass BSDF it works without issue. This means that my GPU is quite capable of working with Cycles and I'm guessing Octane as well. There must be a BUG.

Just thought I'd flag this.
John

Event Timeline

John Stockton (Sanchogrey) created this task.Nov 4 2019, 7:20 PM
Brecht Van Lommel (brecht) changed the task status from Unknown Status to Unknown Status.Nov 5 2019, 2:15 PM
Brecht Van Lommel (brecht) claimed this task.
Brecht Van Lommel (brecht) added a subscriber: Brecht Van Lommel (brecht).

Thanks for the report, but this report does not contain sufficient information for us to investigate the issue.

If you think you found a bug, please create a new report with all the requested information:

  • Test using the official latest 2.81 build, not an octane branch. https://builder.blender.org/download/
  • Attach a simple example .blend to reproduce the problem, and the render you get.
  • Verify if CPU and GPU rendering gives different results or if the issue exists for both.