Thanks for the tips. Interesting technique by Pixero, using a mesh with random displacement and fur plugin! However, I guess that unless you use a bitmap of a branch... if you use the bitmap of a single leave, it may look a bit shallow even with the 2nd smaller one inside... maybe not. Only tests can tell.
As for Pilou's tips... I dont see how that TGI3D plugin is of much use in this case, but it's amazing and I can think of MANY other uses for it! Thanks for bringing it to my attention... it´s paid, however, right?
Random replacement is an old known plugin for me, including the version I asked where you can set several % for different components. It may be important to give variety to leaves.
But the important suggestion from Pilou was the obvious random rotation/scale.
After I posted the thread, I went to bed and I started thinking of making a box shaped like the hedge I wanted, then make a small box component a bit larger than the leave... multiplying it thousands of times over the "hedge shaped box", then using SketchPhysics to let them fall and fill the hedge box...
Then replace the thousands of little boxes component's geometry for a leaf geometry.
It just seemed that it might lag a bit lol.
And then I thought: damn, wouldn´t it be easier to just place all components where I want them in an array and then use some plugin to randomly rotate and resize them????
I was sure there was such a plugin...thanks for thinking the same solution I did Pilou, and giving me the link before I asked 
