Re: Creating a cracked glass effect

Make a grayscale image of cracked glass where the (large) different pieces have a different gray value, then use this image as a displacement map for the displacement map effect, which would be applied to the footage? This would shift the image slightly for each piece of glass.

Maybe also add some semi-transparent images (also displaced) over the footage to suggest reflections in the glass?

A little camera shake on impact? (check the sticky post at the top of the AE COW)