The technique you can learn on the book and on internet, but you need to know that you will ( like me my friend) pass a very very very long time before you understand how all work. After you need a very powerfull computer and some very expensive material to get these result (of course if you do it with a 3d scanner process like me). If you don't use 3d scanning you can just buy a powerfull pc, the 3d softwares, a graphic tablet ( you can without but highly prefered) and thousand of hours working on internet to try to understand. But If you really want it you'll do it. Nobody teach me 3d, I learnt everything on internet and on the books and here is the result.