Dear all, this thread just rocks, I've discovered recently houdini and I think it's really a beast of it's own. I generally work in biomedical illustration and I was searching for a technique to recreate and illustrate human kidney and glomeruli. At a fist glance they look quite a lot as a growth diffusion process but also a lsystem. I was thinking about growing "lines" inside spheres with diffusion process but I don't know if is possible to set a node for activating a lsystem at the same time. Any help would be appreciated also if anyone is interested in this topics I would be glad to talk about them.