How can I rename this thread??:)
So, here are some new screenshot (snow effect based on gpu particles).
In this scene, there are 270k particle with depth map based collision.
http://mcsiv.hu/snow1.jpg
http://mcsiv.hu/snow2.jpg
Snowflakes are generated sprites with geometry shader (without textures at the moment)
Otherwise: i'm started to write the tutorials;)