You have to use the motion vector shader and a custom AOV because the default motion vector AOV values are not normalized. RSMB expects float values between 0 and 1.0 in Red and Green.
Here is quick render (RSMB blur amount set to 8 - very exaggerated - should be 1 for conventional 180° camera shutter).
Lastly, RSMB compared with native Arnold curved motion blur, much nicer. So, remember RSMB is not the real thing. ;-)
Maybe you can separate the FG from the BG and put RSMB only on the FG and then composite it back together. I guess your scene will never render correctly with RSMB, too many small, overlapping objects.
Thanks @Sen Haerens. That is very helpful. Your approach gave me the best results so far.
However i still remain with an ugly smudge around fast moving objects. Its as if the mv blur data affects the areas around the moving object as well. But maybe its a result of the limitations of the curved motion blur that you pointed out.
Hi @Carlos Dordelly, thanks for the outline. Yes that is the easy part, but these motion vector passes never give me correct results in After Effects using ReelSmartMotionBlur.
The "Ignore Motion Blur" option in the Diagnose / System Settings is new to me though. I've been using an instantaneous shutter, which has the same result as the "Ignore Motion Blur" option i assume.
There has to be some specific way how to deal with the mv passes inside AE - like adjusting the Blackpoint, max displacement, etc. I tried anything i could think of with no success.
So any further hints on how to correctly work with these files in ae/rsmb would be highly appreciated.
Hi @Oliver Navarro Schroeder! You can do:
Turn on motion blur -> Add motion vector AOV -> Turn on "ignore motion blur" option in the system menu.
But I don't know how to use correctly inside After Effects with the RSMB plug in :/.
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