Lately I have been using Sketchup as an electronic alternative to a white model. One advantage to this approach is the ability to send accurate 3 dimensional imagery to a director even if they are remote from me.
Here is a model of Always.. Patsy Cline from the summer of 2013 at the Millbrook Playhouse. After viewing the model the director chose to flip the set left and right which can be seen in the production still.
This is a model of A Midsummer NIght's Dream
Here is the model of Boeing Boeing