In creating my other Lens on theater set design (look in the right column), a few questions kept popping up from visitors - because I hadn't thought of them. So, Finally, Here are a few answers to the puzzles that a theater production can.
How to Make Fake Rocks Using Expandable Spray Foam
Tutorial on how to make faux castle walls. Could be done on card board or mural paper for decorating for medieval theme. Easy diy project for painting castle walls. Excellent instructions and pictures.