How is this essential to a game ?
GameStudio IS NOT the Doom 3 engine , or the bloodrayne engine . As for if it's possible , everything is possible one way or another , in case there isnt any sane way of going about it you could always make the 2 or more objects diff models and animate them then connect via script . Though for something as unimportant as this , a good character skin is the best way to go, as is done in MOST games. When you look at GameStudio , dont wonder if you can pull of Doom 3 with it , YOU CANT , think of it more like a Q3 equivalent with shaders , not bad at all for the price tag if you ask me. BTW , the reason i may sound blunt is the fact that a lot of the shaders (like the one in the link posted) will kill your fps and aren't alwayz the best way to go about things. Bump Mapping and Normals Mapping are supported though , and to me , thats about as good as it gets.