Check this tutorial out and learn more about Adobe Pixel Bender technology and start making your own plugins.
This tutorial is a bit different from all the others here, however I’m placing it in the After Effects category, because it’s very closely related to After Effects. In this tutorial I’ll show you what a Pixel Bender plugin is, how it works, and we’ll finish off by creating our own, very simple cropping plugin for After Effects CS4.
Sure we can crop any layer with a Mask tool, but on the other hand animating mask points might be painful sometimes, especially when you try to animate it using expressions or some tracking data for example, so having a nice and simple cropping plugin in After Effects is not a bad idea after all.
If you’ll find this tutorial interesting make sure to visit Adobe Labs for the latest version of Pixel Bender Toolkit. You’ll get a full documentation and a few examples with your download to get you started. Good luck!
If you got interested with Pixel Bender then you probably would like to read Pixel Bender and aeUIControls post.