Yep. I learned that when I first started in poser because I wanted to make "tubes" for my PSP resource site and I figured there had to be a better way to do that than having to render and "tube" the images myself. I prefer .png saves, but I know others who use TIFF and load from the alpha channel to get rid of the backgroung. PNG is the same thing, only you don't have to do the alpha channel step to get rid of the background. Also, another tip is once you do your post work and want to resave it as a .png, don't just press "save". Use the "Export PNG" feature of your program. It saves it with an alpha channel but it also compresses the file size down without losing image quality. A great way to save website space if you offer Poser images for graphic use.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi