I noticed a strange problem. I made a new PBR Mat for faking glossy Lips. I am running in two problems:
1) I cannot use blend modes like Hard light or overlay or screen - if I do the whole Texturesheet will show as a black mask over the face. Any technical explanations for that? I used already everything from opacity mask to ColorMasking RGB and A channel on top of the dialogue...to no avail.
2) so I apply the glossyLips Mat as "normal" but I notice an occluding effect on particles that lay in hirarchy above the lips and thus should actually be rendered "after" the facemask. I checked the renderorder. Only if I drag the particles above the lips (in my project window) they render properly on top of the face.