Join Chris Meyer for an in-depth discussion in this video Exploring Motion Blur and Decontaminate Edge Color, part of After Effects Apprentice 13: Paint, Roto, and Puppet.
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Finally, let's talk about Motion Blur and Decontamination.…Roto Brush has the ability to automatically detect what portion of an edge…is moving and give that edge additional blur to compensate just …as real footage maybe blurred.…Let's go to around Frame 26 where his hand is raising somewhat quickly.…If I turn off Use Motion Blur, all I'm going to get is my softened, …feathered edge around this area.…However, if I enable Use Motion Blur, you'll see that this hand is more blurred…than other portions of his body, which are not moving nearly as much.…
If I want to I can solo this layer and compare without and with.…Look at just the Alpha channel without Motion Blur, even edge Feather …all the way around, with Motion Blur increase blur where his hand is moving.…And I can tweak the motion blur settings to include more Samples Per Frame,…basically smooth out any ghosting if there's fast movement, and also set Shutter Angle …to match how my shot was originally taken.…No Shutter Angle is very little blur.…
The After Effects Apprentice videos on lynda.com were created by Trish and Chris Meyer and are designed to be used on their own and as a companion to their book After Effects Apprentice. We are honored to host these tutorials in the lynda.com library.
- Creating, erasing, and animating brush and clone strokes
- Using Paint to reveal a layer over time
- Creating animated distortions to flat artwork with the Puppet tools
- Replacing backgrounds with the Roto Brush