like i said before, i'm sure its just shaders. here's one technique from GameDev.net, which i'm sure could be done in 3dgamestudio with a shader, but i'm not in the know-how and i don't have a high enough edition so someone else will have to do it
http://www.gamedev.net/reference/articles/article2193.aspthis is for a fixed light source. i guess if you want half-life 2 style shadows (which are directional) you'd obviously have to tweak it a bit. ask someone in the shader forum if you are really interested. would be nice to have native support but it would probably just be a shader (i guess) built in that you can turn on/off.
Julz
