Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
T
I recall that there's a '1001 shadow tool' to draw shadows on faces as new grouped faces - this is possibly the basis of what you want... http://www.1001shadows.com/en/index.html