Waving flag in After Effects from vector Could anyone provide some insight on how to go about animating a vector flag (such as the one pictured below) to wave in the wind. Simultaneously, how could also animate what's "printed" on the flag to match? (Another example below). Thanks for any help.
The simplest way would be: 


Create your flag in Illustrator
Think about or simply test how many frames/steps are key for animation
Draw your frames/steps on seperate Illustrator layers in to get the same position for all of it
Paste your frame/path with CTRL+V on 1 solid layer every 4-20 frames by switching between After Effects and Illustrator back and forth - time depends on your animation


Explanation: Through pasting the masks at a different time, After Effects automatically creates keyframes of the mask shape property. All copied shapes become interpolated keyframes like a roto shape animation to get soft transitions. 

Note: The only limitation is that the number of anchor points per vector image should remains the same to get soft interpolation between the shape keys.