I am trying to create a growing crack effect in Houdini somewhat like in the movie 2012, for my Master's Degree project. The thing that I am looking for is explained in the concept of my project on the following link:

http://www.youtube.com/watch?v=kxCXA0sj4eE&NR=1 [youtube.com]

I have tried many examplles and tutorials online such as

http://vimeo.com/20952890 [vimeo.com]

I even followed the discussion on this link

http://forums.odforce.net/index.php?/topic/12604-animating-a-crack-up-a-wall-in-houdini/ [forums.odforce.net]

But nothing is helping me out to create the similar effect like in the movie.

Kindly help me in generating the effect as shown in my concept art.

For this effect, i will do:
Create a shape with boolean (Cookie SOP) to define the main shape.
Apply a voronoi fracture then use metaball forces to animate the effect.