The simplest method is to render an image in Poser to a new window at 91x91 and save it as a .PNG directly out over the original .PNG thumbnail. No paint package manipulation required. In fact someone posted a while ago that you can do this at odd resolutions eg 150x91, as long as the width is 91 it still puts up a new thumbnail. It works in Poser but the thumbnail won`t show up if you use P3DO explorer. If you want to do paint package manipulation be aware of the PNG alpha channel. Mark