I have made a smoke filled room with a particle simulator inside a 3d model that has windows. From the outside the particles can't be seen through the windows which are set to 50 % opacity in the materials setup of the 3d model. I can see all the other 3d models in the room through the windows so I don't understand why I would not be able to see the particle simulator. All 3d models and and the particle simulator are set to 3d unrolled. Anyone have any insight on to how I might make this work?