Yea flow is the same as motion vector. So I am already rendering these using the motion vector
ROP. SO, it would be nice to have all this in one ROP, not important.
mikelyndon-sesi
And by depth do you mean a normalized value from 0 - 1?
Yes.

I am not quite sure how to do this, I know it involves Pz but no more than that.. I am still learning. I am just trying to get a pipeline down. I had recently used FumeFX for fluid simulations and I had a plugin in 3dsmax that did diffuse, alpha, normal,and depth passes (it calculated the distance of the volumes center from the camera to get a usable 0-1 value) all at a push of a button, so now I am at a loss.