A little late responding here but most (maybe all) of the renderers that Zandar mentioned are not raytracers - they're scanline renders with raytraced effects. Trying to compare the two is like comparaing apples and oranges, they're both fruit but they sure do taste different :-) Raytracers were largly developed by acedemia with an emphisis on accuracy, hybrid scanline renderers were largly developed by Pixar/Mental Ray with an emphsis on speed. And they darn well should be fast since the last time I looked, the standalone version of the Mental Ray 3.2 renderer (only!) was over 1K$. That's why you don't see many in prosumer 3D licsenseing the high end renderers mentioned - the additional cost would push them right out of that market. Raytracers, on the other hand, are relatively easy to code and the tecniques used are largly in the public domain and widely available. Having said that, there is a low cost scanliner, Pixar's (now Apple's) REYES render engine and some good API's for it. It's used in apps like Mojoworld, Poser5, Zbrush, etc, but it's not (in my view) in the same leauge as Mental Ray/Vray/Brazil. It's also some 5 years old and it shows. So, we put up with it 'cause Raytraceing is cheap and can produce darn good renders.That's really what the prosumer market is all about :-) Sorry for the long ramble; Dan