Does anybody know what am I looking for?

[Victor]

Snow. There is any how that I could modify one of the particles (I don't understand the particle editor) so it looks like snow or is there a better way, like, directly importing penumbra snow particles to HPL2 (Game crashes when I tried to use it)? Please, I really wanted to make a cool outside environment. AND, there is any how to make the cold effect of the beginning of Penumbra in HPL2, too? Thanks!