SVG Rock Ripples

I'm starting to try and push SVG in a different, slightly more complex and less 'flat' direction.

Because of all the filters it's using, it's a little CPU heavy on the CodePen version which you can view here:
http://codepen.io/chrisgannon/details/QjvzYo/

Inspired by this:
https://www.behance.net/gallery/9912687/The-Looking-Glass