Having a play with noise based curve growth with self avoidance.
Thanks to cgwiki for the original source file: tokeru.com/cgwiki/index.php?title=HoudiniDops
and some great info and sample files on odforce: forums.odforce.net/topic/25534-differential-curve-growth/
I used pop streams to control the point velocity at the base of the shape otherwise it goes crazy. The mesh was exported as an alembic (7GB!) and rendered in V-Ray.