The problem is, for the first time, I'm noticing some serious limitations on RPF motion blur that have never really been such a problem before.
The main problem is that the blur doesn't seem to be adapated to the speed of the object. In other words, an object that's moving, say, 50 pixels across one frame gets about the same blur as an object that's only moved 5 or 10. The problem with this is that really fast moving objects need to become streaks in order to look naturally (especially since I'm working at 24 fps, not 30 or higher). Instead of streaks, however, what I get is an object that appears to jump across the frames beacuse each of its locations across the animation aren't being "connected" by a longer blur.
Meanwhile, objects moving slowly are being blurred too much!
What I get as a result is an animation that's the opposite of what I need-- too blurry overall, except for the really fast objects, which are too sharp.
Since this is unacceptable for any animation in which all objects aren't moving at consistent and similar speeds, what are my options? Obviously rendering true motion blur is off the table, since I've already got a render time that spans in the days and would literally become weeks if not months if I had to multiply it by a healthy number of motion blur passes.
I know the bigger studios and agencies have a lot more rendering muscle than I do, but even in thier case, a multiplier is a multipler-- x8 or x16 the render time is still a massive overhead.
Do the bigger guys actually render 3D motion blur or is there simply a better post effect solution that I haven't found yet? I've used both Combustion and the ReelSmart plug-ins and have yet to find anything that handles the kind of situation I've described here.