maclean: I know! Most other 3D-programs has such function. too bad that Poser hasn't such a feature. ockham: thanks for this. seems to need a lot of mathematics and im not sure, if it is possible to access all the neccessary values with Python. I have to check. I still have the hope, that there is a solution with the boundary boxes of the objects. what my "studio" does is very simple (even though very interesting - i hope): lety say you want to see how one character looks with different hairs, of different expressions, or several lights ... or you just need renderings from a prop from different views: thats where you need this studio. you select a file or a complete folder and everything in it will be combined, rendered and saved as a image. as an example: you want to test how vicki looks with some faces and hairs to find the best one. choose vickie-cr2 and select the folders with the hairs and faces and everything will be combined. all possible solutions .. from every angle you choose .. thanks for your help so far ...