Thanks for all those answers but I am still very confuse. Correct me If am wrong, but when I buy a model from zygote per example, it includes a OBJ and CR2 and RSR. WHat I understand a RSR can be reproduced by Poser so it is like an image. So if I change a figure, I believe that the CR2 get changed and this is what we downloaded from this site. My understanding is that maybe the OBJ is the original file and get never changed. Is it right? What is included in PZ3 (OBJ? RSR? CR2?) Thanks for taking time to answer me.