Hasta La Motion!

Hi all, I am wanting to add motion blur on a spinning propellor in a shot i am working on. now i’ve been using a plane with an animated texture on it, and it KIND OF works, but i’d really like to use the actual geo for the motion blur.

now i know real 3D mb is expensive to render, so i am looking into vector motion blurs, but i don’t quite understand it, it seems like it’ll work but i don’t know how to properly render out a vector pass from maya to make this work. and what’s worse is that since it’s SPINNING the motion blur has to be accurate 3D wise, not 2d.

I did a little test through fusion using the i think mv2d toxic render pass from maya (i rendered in exr btw), and using the vector blur tool in fusion, and i get this:

http://vimeo.com/20585809

it KIND of works, but then the edges of the blades are really screwed up, it’s not blurred correctly, and it’s a straight line the motion is circular so edges should be circular too (well that’s what i am assuming), and overall doesn’t look too good to be used.

I tried using the reelsmart motion vector plugin, but i don’t even know how to use that thing.

so i ask you all this: how do i properly render out a motion vector pass for a shot like this (a shot with a propellor spinning at rapid speed and at the same time the camera changes angles)? and how do i use it in fusion? do i really use this vector blur node in fusion that seems to have no customizable settings? or is there another node or plugin i can use?

thank you all in advance