The following discussion started a number of years ago when member JCarey asked for ideas to construct an Empty Tomb scene for their church.
JCarey's original question was whether or not anyone had used "resin" or "foams" like some theater companies do to make large light structures. Jean also considered making it out of chicken wire and paper machete.
Several responses to the original question reveal a number of possible materials depending on your needs.
You can find a more detailed discussion of "Empty Tomb" building techniques in our Empty Tomb Stories Forum!