Not so, I mean in theory you are correct, but if you are looking for photo-quality results from a .jpg image, you are fooling yourself. If you are producing web-ready images, unless everyone you know has a T1 you are stuck with .jpg for now, and that means compression. Taken out of context, I would say that if you are having a problem achieving realistic results in Bryce, consider picking up some books on it or browsing the forum with a "realistic" search. Chances are it's the lighting and/or the ambience that is making you feel like your images aren't photo-quality. Truth be told, most photos DON'T look realistic, only our brains accept them as real because we "know" they are. Use this to your advantage. (bows to you)