I'm doing a character animation right now. I wanna apply a "potato stamp" texture on the characters like opening sequence in Catch me if you can. I tried fractale effect, but it's not good. I knew they did really handmade stamps in Catch me if you can. But I want to know how to make it in After Effects. Thanks!
You can use the fractal noise effect to create a few still patterns then loop them similar to the Squigglevision effect invented by Tom Snyder. Use the precomped layer as a track matte. You only need a few patterns looping at a few frames per second. Create the textures in Photoshop first if you'd like.