Transmission Roughness in Principled isn't working in EEVEE #60525
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Reference: blender/blender#60525
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System Information
Operating system: Windows 10
Graphics card: Geforece GTX 1060
Blender Version
Broken: 2.80,
84c06e996aWhen you try to change Roughness of the Transmission in the Principled BSDF node it has no influens on rougness of the refraction. But if you change roughness of the material in change the roughness of the transmission. Is it a expected behavior or a bug, I don't know but it make me think that it's a bug because of independent Roughness for the refraction exist in the node.
ice_video_20190115-123102.webm
Added subscriber: @mikhluz
Transmission Roughness in Principled isn't workingto Transmission Roughness in Principled isn't working in EEVEEAdded subscriber: @WilliamReynish
I don't see a bug here. Works correctly.
0% Transmission Roughness + 0% surface Roughness
50% Transmission Roughness + 0% surface Roughness
50% Transmission Roughness + 50% surface Roughness
Added subscriber: @fclem
Are referring to Eevee or Cycles? Indeed, in Eevee, the Transmission Roughness parameter seems to do nothing.
@fclem Is this a known issue or limitation?
Yes, in cycles it works correctly but in EEVEE it's do nothing.
This is a limitation. Eevee does the same as using MultiScatter GGX in Cycles and does not use the transmission roughness. I've updated the documentation to include this.
Changed status from 'Open' to: 'Archived'