Mathias Agopian b78ea90c27 apply thin roughness remapping to solid as well ...

this is because for solids we're also handling both interfaces in one
go (as opposed to calculate the actual btdf), and roughness should
depend on the ior.

Also rename some variables for less confusion (we now use 
incident(I)/refracted(R)).

2019-12-08 22:18:18 -08:00

..

thinglass.obj

apply thin roughness remapping to solid as well

2019-12-08 22:18:18 -08:00