Hello,
I’m looking for quite some time how to enable the cold breath effect… I believe it’s related to the atmosphere key of the worldspawn, but I haven’t found yet any source confirming this thought. And since Google nor SD forums seem to have an answer, I post a thread ^^’
I used the keywords “cold” and “breath”, I don’t know what else could help 
I’m sure some experienced mappers know how to, I would like to make some winter maps and use this feature ^^
Thanks in advance,
Mateos

