Use roughness from metallic alpha

Questions
1

When using a metallic gloss map texture…

So the is a flag UseRoughnessFromMetalicTextureAlpha and Green

What if these are both set to false, where does it get roughness

Is the an option to use roughness from albedo texture alpha ???

2

Yo @Deltakosh, @sebavan or @Evgeni_Popov … Got any thoughts on this one ?

3

If both useRoughnessFromMetallicTextureAlpha and useRoughnessFromMetallicTextureGreen are false than the roughness will only be equal to the roughness property you set on the PBR material, it won’t be modulated by a value read from the metallic texture map.

No, roughness can only be read from the metallic texture, either from the green or alpha channel.