Attached Link: http://www.multimania.com/arte/indexeng.html

Here's a great place to start. Once there, click on the Plant Tutorials, and look for the one that says "make new leaves" or something like that. For the Schefflera, you might have to try the tree technique, of making a four-cornered symmetrical map, but I can't remember right now what type of map the Schefflera uses.