Uber iRay setup for imported .obj file with Glossiness & Reflectivity maps

lilweep

When setting up 3rd party obj files in the Daz iRay Uber shader, i've found it pretty straightforward to plug in PBR workflow maps when they contain metallicity & roughness maps.

But how does one set up shader settings when obj comes with Glossiness & Reflectivity maps?  

In the specific example im working with right now, the Glossiness maps are usually around mid-grey and Reflectivity is usually around white.  I could post some of the .mtl values that came with the obj if that is helpful, but mainly just looking for a general rule.

 

felis

Well, based on your description, my guess would be that Glossyness shall in Glossy Weight, and Reflectivity shall in Glossy Color.

Gordig

felis said:

Well, based on your description, my guess would be that Glossyness shall in Glossy Weight, and Reflectivity shall in Glossy Color.

I suspect that Reflectivity is another weight map, not a color map, and probably best suited for, say, Dual Lobe Specular Reflectivity.