Just a footnote : "what thip does in Amapi" can be done by anyone in any 3D app, provided it can do Booleans and move vertices. It's a simple technique : you "scan" the reference figure by booleaning thin slices, and then fit rings from your own mesh to the slices. Boring and uncreative work, but once you have a good base mesh you can use it for all future clothes creation for that particular figure. Better - and more expensive apps - can do the basic fitting stuff automatically (such as ClothReyes for 3DMax), but who can afford those ;o)