(let me know if this needs to be moved - dg)

xfrog (or “greenworks organic software”): http://www.xfrogdownloads.com/

one of my lsystem attempts - stylistic rendering building trees with cube primitives for an artificial life simulation:

the cubes approach was too slow (in 2004) so I moved to using camera facing geometry (sprites), textured with faked normals to make them shade according to the lighting to appear cylindrical:

this might be a technique for background mass foliage - level of detail maybe…