Thanx, in the meantime I had managed this, but in a weird way. I couldnt get an image from poser through PIL and then into TK. Now I save it from Poser as a TIF, load it in PIL, then save it as GIF and finally load it into TK. Apparently nobody could help me to find a better way of bringing a picture from Poser to TK. Is there one ? The programm itself uses a genetic algorithm to evolve facial expressions - the user clicks into one he likes, and then the evolution process takes place. This can be done with faces and even whole figures.