I found 2 ways to separate the vector blur for a single object. one with layers , the other ID mask. both use the color mix. i do not like this cause It changes the colors . I adjusted the setting and still it changes the colors, hue, tint… I can not get it correct. Is there a way to do it without the color mix?
Thank you
Use Render Layers and Alpha Over rather than Mix. You may have to Vector Blur the Alpha channel for the Render layer with your moving object as well as the RGB component, depending on how you have thing set up.
Thanks . That made it work fine.