I'm pondering putting stencil buffer shadows into my engine. The main problem ( for me ) is the generation of the silhouette thats then extruded. I have thought about using a 2d convex hull algortithm (grahams or quickhull, say) but these may give me a odd appearance on the ground. Thoughts? Benedict

A quick search on google.com will give you some good results.. Btw, store your adjancey info in your file format so you do it all at once.