@Whine: Well if you just need different leave-textures - you can change the the texture per script. So you just need to make more then one for the different seasons. What can't be done with my plugin is a automatic growing of a tree. Well I think this is realizable but don't know if it is usefull. For those who want to have growing-stages: It could be done manualy by changing the length or height of the branches or trunk.
@Loopix: Habe nochmal ueber DEIN kleines Problem nachgedacht. Wenn du kleinere Blaetter haben moechtest, nutze doch einfach mehr Offset Flaeche fuer die Blaetter. Einfach die Blatt-Textur kleiner machen und nach belieben verschieben...

MfG
André W.