I'm having difficulty getting proper results.
I've been referencing this fairly in depth howto:
http://aloedesign.com/2008/12/maya-2d-motion-vectors-tutorial/4/
I setup a pretty simple scene with a sphere animating quickly from left to right, above a static floor - I'm using passes to output 2d vectors with the bty exr.
In After effects, I'm setting up a 'pre comp' and using EXtractoR to copy the 2d vector into to the appropriate R/G channels. I've applied the RSMB vector effect to the bty pass and am directing it to point to the vector precomp.
I'm getting what seems to be correct blur on the animated sphere, but the floor has a very slight (though constant) blur as well. Looking at the RGB data, I can see that the floors R and G are at 0.5020, while I'd expect them to be at 0.5 to represent zero velocity.
Secondly, from what I understand, the vector pass shouldn't be antialiased, yet it's output from Maya-mentalray via exr antialiased along with the bty. Is there an easy way to disable it for this pass, or must I render it a second time with antialiasing disabled?
In the file reference below, I've included my maya 2009 scene and after effects cs4 scene. Maya is setup to render a very fast sequence of frames that the after effects scene is looking for.
http://www.darkform.net/rsmb_prob.zip
thank you for reading and any insight you may be able to provide.
.jeremy
