[David Löfqvist]

This is a very old post, but I just wanted to do the same thing with a pond and I couldn’t find an answer for it on the web so I thought I’d share a simple method of making the basic effect. Firstly, no. I haven’t found a way to make it respect masks in order to make real reflections. (Precomp will only mask it away, not make it reflect correctly). So what you have to do is to distort the borders instead. I’ve included 2 pictures that should be pretty selfexplanatory. First add the radio waves and make sure they reflect. Secondly add a Bezier Warp and make them follow the path as best you can.

This is the result(Of course you’d want to use it as a displacement map and not comp it directly on top of the picture)