whats the best way of adding a texture over a vector animation i have to give it a more rough look. i can add a opacity mask in illustrator but i dont thing i can bring it over so easily. Anybody know how i can add this effect?
Depending on what you want to use as a texture. If it's a plugin, like Fractal Noise, you need to apply the filter on a solid, use the plugin controls to animate the texture to match the movement of the background, precomp and use that either as a displacement map or matte.
If it's an image, you need to create a animated layer that matches the background movement (use motion tile on the image to extend it) and then use blend modes or displacement or as a matte to comp the image on top of itself and offset and color correct... there's a lot of ways of doing this!
The easiest is if you find a specific look that you're after and post that here- you'll get a more specific answer.