Different materials for different scenes? Is it not the Rhino standard use? Or did you mean different material settings for one scene? Maybe it can be done per Snapshot (Rhino 6).
For example, in a case I have 2 views of a tower, a close up view I want the glazing to be more transparent so I can see through while a far away view I want the glazing to be less transparent and more reflective.
I wonder if the Enscape doesn’t response to the layer material setting? Seems it only response to objects’ material setting?
So, you would like to use copies of your tower windows objects on two layers? Maybe @Demian_Gutberlet can help for the layer materials, I don’t used it yet.
But you could assign different glass materials to the objects at the two layers, right? I suppose so you could switch the material setup on a single layer per Snapshot too.
I don’t think it is efficient to prepare duplicated material layers – if you have other material object layer you have always duplicate layers as many as your views