A B&W render egine is such an interesting thought. Can't see it ever happening but it is interesting. I sure regret that B&W motions pictures have been so much abandonded. Some of those movies were so intensly beautifull - even some of the cheap B movies. When my wife was away for a couple days once I turned the color off on the TV to see if I would miss anything... of course the quality was not like you would find with actual B&W cinematography but in fact I really didn't miss the color. Often the color is sloppy anyway.