This tutorial is absolutely excellent, it did help me a lot. And the grass script was simply fantastic, I wish there would be anything similar for terrains - it creates grass sprites (models are also possible) randomly around the player, but only on the textures you want - that means, only on grass textures. No additional scripting needed. And it's possible to adjust how many grass you want and how far it should be visible.

And Loopix, don't say "poor" swiss developers - Kindred of Nakhar is "only" on ice, Leopold did teach us (at least me) the art of block level design, your vegetation model contributions are fantastic, and snake67... where the hell is snake67? ^^