|07 July 2010||#1|
mental ray motion vectors to blur in Nuke
I have been searching online for tips on how to do motion blur in post from elements rendered with Mental Ray. I have yet to find a good explanation on what to do in Nuke, what kind of motion vector will work from Mental Ray. Has anyone gotten a good result that they used in production?
I am having difficulty figuring out what the node graph setup would be in Nuke. Some say that what is needed is a vector blur node, others say you ALSO need a motion blur 2D node... I just don't know any more... I am also reading about needing to plug in expressions to offset the values for u and v channels, but I am not sure how to do that, either....
Any help would be great!
|07 July 2010||#2|
Dubai, United Arab Emirates
Join Date: Jun 2010
this image was composited in Nuke...
first .. in maya .. i made motion vector pass with
((puppet shader - motion to RGB shader)) ... it will give
you a perfect effect...
then inside nuke make this tree
plug the MV pass as (input 1) in shuffleCopy thin ..in "forward channel" as U, V channels
and plug the default color stream in (input 2) as (RGBA)
and in the vector blur node ... just select the channel "forward" because in the
shuffle we plugged the motion vector pass as forward ((U, V))..
and begin playing in values to choose the right values to the Mblur
i hope this could help you
Hazem M. Sabry
MBC Creative Service
|02 February 2011||#4|
Join Date: Sep 2003
Thread automatically closed
This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.
Note that as CGTalk Members, you agree to the terms and conditions of using this website.
|Thread Closed share thread|