Make sure you an see the FOREST for the trees!

After a long time not contributing to the Houdini community, for Nodevember I've been starting my favorite 3D application again. Not very happy how it turned out (flickering too much :-( ), but next topic is calling….
Here's my forest growing into a shape and growing berries on the shape boundary.
Video and the source file in the attachments, in case someone wants to play with it…