Blender 2.77 Motion Vectors I am new to Blender and trying to render out motion vectors on animated objects.  I animated a cube and did what I thought was correct and it rendered nothing.

See video: http://www.knottypixel.com/BlenderMotionVectors.mp4

Would appreciate any help.  I am sure I am missing an obvious step.  It crossed my mind that the speed output of the render layer node could possible not be in the range of 0-1, 0-1, 0-1.  Does it require a conversion?

Thanks!
Some times vector passes like depth or motion can't be displayed directly because they are 'out of range' of displayable values (I think , not really sure)

Anyway all you need to do is to bring these values within range by using a Vector > Normalize node

Have in mind that to actually use the vector pass the original 'non displayable' values are sometimes the correct ones that will produce the desirable outcome even if they can't be displayed correctly directly.