Windows for now. Mac and Linux later. I have a vertex normal editor that's used to manipulate leaf cards for better lighting. It would definitely be possible to add complete tree animation as well. Foliage is currently animated with a vertex displacement shader alone. (Also provided with the program)
This looks fun. May i ask what platform it is available for? And is there a way to animate the tree too? This would require to manipulate the vertex normals, so can this be done with the vertex normals editor? Or is this editor just for single elements?