Very cool, i wait years for this "simple" solution - great - many thanks.
This cool method saves a lot of time for rendering a video. Minimal good looking trueSpace like "onion skinned motion blur" needs 5 images (or more) to create 1 good looking frame. For a Full HD Frame which takes a few minutes to render - this is a HUGE improvement.
(Is this a reason to come back and create the short that i have planned years ago

)