I don't understand why anyone would want to work on a fractal image at a humongous size unless they are rendering an image for print by a professional printer. There's no need for that. I usually work in a 444x333, 444x444 or 640x480 window in Ultrafractal. I used to go thru all the fuss of re-sizing after I was done to 1024x768 (my monitor resolution) for wallpaper, then saving those large parameters and rendering them up to 2048x1536 with anti-alising and then re-sizing back down to 1024x768 for rendered wallpaper. I've only very recently figured out that I was wasting a TON of disk space and time doing that and now I just save the 444x333 parameters and render up to 1024x768 with anti-aliasing and it looks just as good or better than the huge files re-sized down. Not to mention the hours spent pasting 150 layers from a small to a big window. It DOES help to take a look at 1024x768 before rendering to fine tune stuff and then just paste any modified layers back down to the small image and save that. I've got hundreds of meg's of 2048x1536 rendered bitmaps that I didn't need to make! I've found that rendering huge and re-sizing loses a lot of the sharpness of textures and darkens the image, too. Same goes for Apo - the "filter radius" is a blurring filter that coupled with the sample density and oversample handles the task of anti-aliasing just fine and maybe better than rendering huge and re-sizing smaller...I think -lol. Rick