[FBX Export] Roughness texture is getting connected to metallic channel #69286
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Reference: blender/blender#69286
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System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 750 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 436.15
Blender Version
Broken: version: 2.81 (sub 3), branch: master, commit date: 2019-08-27 18:27, hash:
697fd86506Worked: (optional)
Short description of error
Dont know if fbx supports the pbr workflow but i noticed the roughness texture gets plugged to metallic channel on export and specular texture gets ignored
All the exported fbx files look very shiny/mettalic
Normal and albedo is exported correctly
Exact steps for others to reproduce the error
Added subscriber: @V-prime
Added subscriber: @mont29
Changed status from 'Open' to: 'Archived'
FBX only supports basic old-fashioned shading currently, so indeed the translation from the Principled shader is rather lose... Not much we can do currently here am afraid, this is a known limitation. Thanks for the report anyway.
Added subscriber: @xdanic
Looks like I can post here despite being closed, but windows fbx has a roughness value, so I wonder if there's a setting the viewer can interpret as roughness.