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Activity Forums RE:Vision Effects Here’s how to get a working RSMB vector pass out of Blender

  • Here’s how to get a working RSMB vector pass out of Blender

    Posted by Bill Mountney on April 22, 2016 at 11:00 pm

    A few months back I searched this forum and the rest of the Internet for the solution to this problem, and I couldn’t find anything that actually worked properly, so I finally just had to figure it out for myself. I just remembered that I had meant to come back and post it here in case it will help anyone else avoid having to reinvent the same wheel.

    The pictures below show the custom node I created called “Speed to RSMB”, followed by where it connects into the Blender compositor, and then the settings of RSMB Pro Vectors using the resultant vector pass layer in After Effects.

    Contents of Blender Speed to RSMB Node:

    Blender overall compositor chain (I’m also outputting a depth pass here):

    Use of resultant vector pass by RSMB Pro Vectors in AE:

    Finally here are a few shots of the resultant render with and without RSMB enabled. These are from a video of an asteroid that is tumbling slowly forward along its longer axis, and doing a close fly-by of a stationary camera that is panning to follow it, causing motion blur both on the asteroid and the stars in the background, and finally the Earth that is unfortunately directly in the asteroid’s path. 🙂 The asteroid, Earth and background were each rendered out as separate passes with their own vector and depth passes, but I deleted all of that out of the Blender compositor picture above to provide a cleaner view of how to connect the Speed to RSMB node.

    With RSMB:

    Without RSMB:

  • 6 Replies
  • Pierre Jasmin

    August 10, 2016 at 7:38 pm

    Thanks Bill,

    Will post a note about this at some point on our MV Tutorial page…


  • Abdullah-Al Sarfaraz Md Yeaseen

    December 21, 2023 at 12:10 am

    Hello there! I was looking for the same solution. The images are not loading in this. Do you have the solution posted anywhere else?

  • Bill Mountney

    December 21, 2023 at 1:38 am

    Hello. I still had these projects sitting on my drive so I was able to create some new screen shots of the configuration in Blender and After effects.

    Here’s the Blender Speed to RSMB node and overall compositing chain in Blender, and the setup in RSMB in After Effects, which is basically to point the Motion Vectors parameter of RSMB to another layer that contains the RSMB output generated from Blender.

  • Abdullah-Al Sarfaraz Md Yeaseen

    December 21, 2023 at 3:25 pm

    Thank you so much Bill for the reply and breakdown.

    I’m guessing the “2048” is the width of your render or max displacement? or is it a constant value?

  • Bill Mountney

    December 25, 2023 at 5:59 am

    I’m having trouble remember where the 2048 came from, but it’s definitely not the width of the comp, because in this project that was only 720.

  • Abdullah-Al Sarfaraz Md Yeaseen

    December 25, 2023 at 10:11 pm

    Alright, I’ll try with that value.

    Merry Christmas! 🎁⛄🎄

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