Re: Multipass

EXR files are waaaay better in After Effects if you have the space (and time for some extra processing). The advantage of EXR files is that they contain extra information about lights and darks (like an HDR image), so your composites get much more interesting. To do this, make sure you have After Effects running in 16- or 32-bit space, preferably the latter.

Bartek: Why are you passing your render's Speed information through the Set Alpha node before it reaches the Vector Blur node??