3DSprite: The short answer is "Depends on what your target medium is". Use pixels if you're targeting the Web (or just monitor display) and use inches or centimeters if you (or someone else) is going to print it. You can "add" pixels through a process called interpolation. PhotoShop uses bicubic interpolation as it's default and I have found it to be excellent. However (you knew that was coming, right?), interpolation will not add detail that wasn't there previously! It will only increase pixel density, enabling you to raise the resolution for larger output. If you uncheck the two boxes at the bottom of the image size dialog box and then chage the image size or dpi size, you will be able to see the way these factors interact. For instance, when you render in Poser 4 no matter what dpi you specify in the render settings, it always comes out 72dpi but the size, in inches, can get rather large. If you import the finished picture into PhotoShop and invoke the Image Size dialog, then uncheck the 2 boxes I just mentioned, and change the image size to 1/4 of it's current size, you will notice that the DPI number increases dramatically. PhotoShop is just squeezing the pixels into a smaller space. Nothing else changes, not even the file size! This is about as far as I want to go with this from memory. They say that as you get past 50, two things start to go. The first is your memory, and I can't remember the second thing :o) -Jim