I don't think that's true. If you edit the material into something that could be considered a different piece of art, it becomes your own. So taking the window of a building out of a flickr photo and putting it into your texture with some cleanup, mirroring and hue adjustments would probably be enough to get you off the…
Some shots of the city, hasn't changed a whole lot, working on water and updating textures, things that arent really visible. Swamp images coming, critique welcome!
no they are not. well at least some stuff they arent. i remember using adjustment layers on cs3 and then when i opened the file in cs2 the adjustment layers lost their info.