[Sidefx-houdini-list] Vector motion blur render pass query

Andy Walker Andy.Walker at framestore.com
Thu Mar 4 14:31:27 EST 2010


It's a native node in Nuke, here's a how to: 


    • Copy node . Copy your motion vector's rgba.red and rgba.green channels into forward.u and forward.v channels. (lay down a copy node, Motion vectors into input A, beauty into input B, then copy rgba.red to forward.u etc...). 
    • Make sure you edges on your motion vectors aren't pre-multiplied (use a merge->unpremult to un-multiply (mdiv) the edges). It's easier to just to turn off premultiply in your render setting's framesbuffer for that pass. 
    • VectorBlur node . Setuv channels = forward . Set method = forward . Set alpha = rgba.alpha . 


Cheers, 




Andy 




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