how about a blur effect when your characters and 3d objects move at really fast speeds?
i can't think of a way to feasibly achieve that. i put some thought about it when i did the scene with the all the cars rushing by. the basic idea that comes to mind is, for that scene, i'd have to speed up the frame rate to about 10,000 times what it normally would be. and then i'd have to composite each final frame (at normal frame rate) to be a blend of the 5000 frames before and after it. i'd be willing to do that, but it would probably take several years just to do one shot. even if the whole process were completely automated, it would still take an absurdly long time even on a supercomputer. so for that reason, that method is out of the question. i also did some thinking about what other gimmicks i can do artistically to sort of give an impression of that effect. and i didn't really have any bright ideas about it, but what i decided to do first is just render the cars moving without blur and take a look at it. i actually thought it looked great without the blur, so i didn't have to worry about adding the blur. and of course, in that shot, i'm glad there's no blur because this way you can actually see the cars in detail