Comment by chii

Having no real knowledge of ray tracing (or rendering for that matter), can someone tell me why we can't be moving towards a massive cluster of gpu (in the order of 10,000) ray tracing a scene in parellel? I imagine each ray trace call is quite independent of any other. SOooner or later, cpu (and gpu) will have many cores available for such form of rendering. Is it because of the chicken/egg problem?