This is my first post and i’m a UE4 Virgin so please be gentle
I’m trying to work out a material for skin and the problem i’m having it it doesn’t appear to me that the SSS shader is working properly. My understanding is that Opacity should adjust the “thickness” of the material, but with a SSS material there should always be some actual subsurface scattering happening as long as there is some light. The problem i’m seeing is that regardless of my Opacity setting, I only get scattering happening in areas of intense light, and the Opacity setting really only seems to affect the threshold for that effect to happen, not the intensity of the effect itself.
Here are some screenshots. Three are in a bright light area, and three in a darker area. In the darker area there is no SSS happening, at all, regardless of Opacity setting. In the bright area, changing the Opacity changes which areas of the skin get the SS affect applied, but the result of the affect is the same, there is no variation to it. Also the areas not being affect never change.
tl;dr my results are showing that the SS effect is either ON or OFF, with no variation to it. It also seems to only happen in areas of extreme light.
Imgur Album: http://imgur.com/a/p1NcE