In this tutorial we are going to build an interesting growth solver that generates ivy branches with tiny roots which connect to the closest surface of a geometry. We will use some VEX and build a custom solver to create some cool growth effects.

useful links:
vimeo.com/172529848 (entagma: Creating Geometry With VEX)
vimeo.com/128296265 (Rohan Dalvi: Creating animated ivy in Houdini)
sidefx.com/docs/houdini/vex/functions/_index (VEX functions in Houdini)