Blackmagic Forum

Is it possible to use a C4D Motion Vector pass to achieve motion blur in Fusion? I've found the "VectorMotionBlur" node, but I'm unsure how to apply the effect. Thank you!

Not sure how you get the motion vector pass out of C4D - usually one outputs an EXR sequence (or some other 32 bit floating point capable file format).

But once you have that, it's simple - you just need to merge the EXR's red and green data into the color image's vector channels. Like so:

• Create a loader for both, the normal color image data (e.g. a PNG sequence) and the vector pass data (the EXR sequence)
• Create a ChannelBoolean
• Pipe the color image into the ChannelBoolean's foreground
• Pipe the vector pass into the ChannelBoolean's background
• In the ChannelBoolean's attribute inspector, switch to the "Aux Channels" tab
  
  • Turn on "Enable Extra Channels"
    
  • Look for the "To X Vector" popup, set it to "Red BG"
    
  • Look for the "To Y Vector" popup, set it to "Green BG"
• Pipe the output of the ChannelBoolean into a VectorMotionBlur