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This is a four-part tutorial about adding motion blur to a Maya render by first creating a 2D motion vector sequence and then using it with ReelSmart Motion Blur in post production. I’ll be covering Maya 2009’s 2D motion vector pass as well as installation and use of the lm_2DMV shader for earlier Maya versions. Once this technique is part of your pipeline, it can be a tremendous time saver compared with creating (and waiting for) motion blur from within Maya. It also provides the flexibility of applying any amount of motion blur without having to re-render.

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In this tutorial from Motion Works, Grischa Theissen demonstrates a must-know technique for adding motion blur to your 3D renders in After Effects using ReelSmart Motion Blur.   

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  Mental Ray shader that can be used to output vectors for RE:Vision Effects plugins

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Motion Vectors out of Maya is a set of 4 tutorials prepared by Arkadiy Demchenko.

Many of RE:Vision Effects tools support motion vectors inputs including: ReelSmart Motion Blur, SmoothKit Directional, RE:Map Displace, Video Gogh, Twixtor Motion Vectors In.

This process will be useful to RE:Vision Effects users in Shake, Maya and Max Composite, Nuke, Fusion, After Effects, Combustion and others.

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Motion Vectors Format Explained

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This tutorial explains the need for alpha in motion vectors.

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There exists different ways to extract motion vectors from a renderer.

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This tutorial explains the motion vectors mapping maths.