Pure White shader with ACES OCIO configuration #85694

New Issue

J-P Busse · 2021-02-16T12:23:55+01:00

J-P Busse commented

2021-02-16 12:23:55 +01:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 1060 3GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.89

Blender Version
Broken: version: 2.93.0 Alpha, branch: master, commit date: 2021-02-16 01:44, hash: 4a784f32fe
Worked: I guess everything before the OCIO 2.0 update

Short description of error
Plugging a texture into the Roughness socket (color space setting on the node doesn't matter) on a principled BSDF Node using the ACES 1.2 OCIO configuration results in a pure white shader. Plugin it into the base color socket shows the texture correct. This only occurs with Cycles, Eevee renders the shader correct. It also doesn't matter if its rendered using CPU or GPU.

Exact steps for others to reproduce the error

Open Blender with an ACES 1.2 OCIO configuration from https://github.com/colour-science/OpenColorIO-Configs/releases
Delete the cube
Add a Plane
import a B/W roughness map (and change the Color Space to Utility - Raw)
plug the Texture into the Roughness input on the Principled BSDF Node
with Eevee everything looks normal as it should
switch to Cycles and the shader becomes pure white

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: GeForce GTX 1060 3GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.89 **Blender Version** Broken: version: 2.93.0 Alpha, branch: master, commit date: 2021-02-16 01:44, hash: `4a784f32fe` Worked: I guess everything before the OCIO 2.0 update **Short description of error** Plugging a texture into the Roughness socket (color space setting on the node doesn't matter) on a principled BSDF Node using the ACES 1.2 OCIO configuration results in a pure white shader. Plugin it into the base color socket shows the texture correct. This only occurs with Cycles, Eevee renders the shader correct. It also doesn't matter if its rendered using CPU or GPU. ![01.png](https://archive.blender.org/developer/F9807975/01.png) ![02.png](https://archive.blender.org/developer/F9807977/02.png) ![03.png](https://archive.blender.org/developer/F9807996/03.png) **Exact steps for others to reproduce the error** - Open Blender with an ACES 1.2 OCIO configuration from https://github.com/colour-science/OpenColorIO-Configs/releases - Delete the cube - Add a Plane - import a B/W roughness map (and change the Color Space to Utility - Raw) - plug the Texture into the Roughness input on the Principled BSDF Node - with Eevee everything looks normal as it should - switch to Cycles and the shader becomes pure white

J-P Busse commented

2021-02-16 12:23:55 +01:00

Added subscriber: @Jan-PhilipBusse