QUOTE(Incendia @ Sep 24 2008, 12:22 AM) [snapback]297692[/snapback]
Yes, PNGs tend to be larger, but I thought jpegs would actually raise the quality, rather than lower it, since it displays many more colors than gif's 256.
More colors doesn't always make for better images. Web browsers render jpegs at 72 dpi, so a jpeg that is not created at that resolution will incur some quality loss. There are also some differences in file compression between jpeg and gif. GIF starts out smaller right out of the box and allows the artist to choose which colors to include on the palette. JPEGs start out with millions and millions of colors and then filter out which colors aren't needed during compression. If you compress the JPEG too much, I believe it can lead to dithering which essentially destroys the quality of the JPEG. Honestly, as LFG shows us, there's not much you can't do with 256 colors since the differences between the basic 256 and the colors added by 24 or 32 bit RGB jpegs are barely discernible to the human eye.
/web geek off