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

Phil Spicer PSpicer at bournemouth.ac.uk
Fri Mar 5 03:55:10 EST 2010

Hi Andy,

Thank you for this. It is good to know we can plug this output from Houdini into both Shake and Nuke...

Kind regards,


-----Original Message-----
From: sidefx-houdini-list-bounces at sidefx.com [mailto:sidefx-houdini-list-bounces at sidefx.com] On Behalf Of Andy Walker
Sent: 04 March 2010 19:31
To: sidefx-houdini-list at sidefx.com
Subject: Re: [Sidefx-houdini-list] Vector motion blur render pass query

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 .



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