I recently tried adding rain into one of my maps, but i found out that "Snowfall" was the only one working. The others didnt show up, and the particle ones crashed the game...
Any advice concerning this problem would be nice
Joni

First of all, it should be a func_precipitation (a brush entity), not a prop_precipitation (a point entity). I'd check this page to see if any error-causing issues are present in your map (specifically the >32000 vertices visible one; how big is your map?). That being said, I haven't messed around with precipitation in Portal 2 yet, and there's a good chance it might just be plain broken.