Awesome piece of software. I m using and loving it for years.
http://www.studiodaily.com/2014/11/blackmagic-design-releases-free-version-of-fusion-7/
can you tell me what the settings are to use the Vray velocity pass with vector motion blur.
Add a brightness/contrast node on to the velocity pass with the brightness set to (-.5) that way you will get proper red/green