I'm having a great deal of difficulty working with transparent materials. My client wants semi-sheer window shades. It seems the transparency has somewhat to do with the direction of light coming through. In the first attachment, the shades were acceptable on the side wall, but turned black at the back wall. I then tried to adjust the light so the shades on the back wall were over-exposed (thinking I could Photoshop this layer on top). I could get the shades to appear correctly on my screen, but again, when rendered, they turned black. If I make them any more transparent, they disappear.
Thoughts? Tips? Next Enscape Improvement?