Hi all,
I'm trying to figure out how to do post process motion blur in COPs by using the velblur node.

So far, via web & forum searching, all I've been able to find is that you are supposed to use the getBlurP to obtain a velocity plane in your output image (see attached image).

I've also attached images of both the results of rendered motion blur and the post process motion blur, so you can see that they are clearly very different (Note: the geometry is static, so this is only a motion blur caused by camera movement, if that makes any difference).

So, how are you supposed to get the velblur node to work?