ghostship2 posted at 3:52AM Sun, 15 November 2020 - #4404625

this is what I had in my shader. No I don't know anything about it either as I was following a tutorial video by Blender Guru.

The marked math node and the one above (not sure about the 2nd one, because I cannot see where it is connected) are the ones that do the calculation of the power of 2 on the roughness value. For Poser 12 you can remove them or, if you want to use your shader in P11 and P12, connect the value2 input of the nodes to a new input of the compound node. If the value is 2, it will be P11 compatible and if the value is 1, it will be P12 compatible.