How do you do dusty metal in VRAY NEXT GPU when roughness is disabled?

[D3Pixel]

Hi

Roughness in VRayMtl is disabled. After searching around all morning it appears that it is not implemented in VRAY NEXT GPU?

I need to create a sort of dusty black metal with some reflection but also has fingerprints, smudges and other dull spots, also a little thin film coating on it due to oil but having difficulty achieving the effect. Roughness is quite good for this but it is disabled.

Any ideas?

Thanks
Geoff

[Neilg]

I would have used reflection glossiness for that anyway. or if it's really complex a blend material where you make a clean version, a smudged version, a thin film etc and blend it all with masks.

[D3Pixel]

I would have used reflection glossiness for that anyway. or if it's really complex a blend material where you make a clean version, a smudged version, a thin film etc and blend it all with masks.

Thanks will give it another go.

[Morbid Angel]

I always always suggest people approach materials as in real world. What Neilg said. Treat surface as clean metal, then add another material with dust, dirt etc etc. If you don't (and this is my problem with substance painter for example) it outputs maps to handle all layer blending inside one map. But then you have to handle the terminated reflectance with not just glossy but reflection amount, diffuse amount etc etc it gets quite cluttered and in terms of control very limited.