In this video I gush about how wet Train is
See an old blog post about fog here (Not the one I was trying to find, but probably MORE suitable since it's about Train) https://blog.counter-strike.net/index.php/2012/03/1072/
0:00 - New Train
1:13 - Old Train
2:17 - Beautiful new details
3:07 - Fog
3:56 - More details
5:25 - Easter-eggs
