Hmmm.... Beatyoursoul's explanation does make some sense, although I'm not convinced that it's a critical factor. I suppose it probably helps a bit somewhere along the line. Lyrra, 'JPGs are evil' - Well, possibly so. They're also the only sensible alternative to downloading huge .bmps or .psds. I always use PS's 'save to web' for jpegs. It's definitely the best option available. Image Ready? Who? I uninstalled the danged thing. Waste of space, as far as I'm concerned. This whole jpeg/power of 2 thing is an issue for me since DAZ demand a template of every single figure or prop. The problem is, the packs I make tend to have lots of pieces, as opposed to one single figure. The current one will have over 100 pieces when it's finished, so making templates and textures becomes a seriously major factor in file size. That's why I want to get my head well round this stuff before I map everything. mac