I wish I remembered the fabric that we used. I can tell you that we bought about 2 yards of 3 different fabrics and used the one with the most amount of 'shine' to it and a small knit. I have also projected onto white foamcore about 1/4" thick. It did shine through to the back side, but in this case the image came from the house. With keystone feature, if the projector is pointing up at an angle, the top of the image will be wider than the bottom. The keystone will allow you to adjust the top and bottom so they are the same width. Focus on the projector first, because each show or display might require a little different solution for the image to be seen on.

Tim