There seems to be definite merit in the "power of 2" hypothesis. I just quickly took my 2000x2000 texture and resampled it up to 2048x2048 and rendered it in Firefly - the result here shows the first time that Firefly has even come CLOSE to representing the textures as they were designed. I might go so far as to say that sticking to a "power of 2" may be necessary for ALL detailed textures. Not just making them square (I already tested that theory) - but it seems that they MUST be 512x512, 1024x1024 or 2048x2048 etc or they just won't render properly. Pass the word... we may have a solution even if it is a pain in the butt to have to stick to these dimensions.