ComangliaSnowshoeI have not seen this in many FPS configs. It's not in chris', or Comanglia's, so this could use some more publicity. :)
The fuck it isn't.
r_pixelfog 1 are in these CFGs I've made
http://teamfortress.tv/thread/25328/comanglia-s-config-fps-guide
https://dl.dropboxusercontent.com/u/92187841/stability.cfg
https://dl.dropboxusercontent.com/u/92187841/cinema.cfg
The reason it isn't in my main config is I expected basically everyone to use DX 8 to begin with.
Also r_pixelfog 1 doesn't make DX 9 look like DX 8 in A LOT OF WAYS namely models, sniper scope, Jarate and Bleed. Plus their's still more fog in general in DX9 even with r_pixelfog 1 than DX 8 though only slight.
The command he was talking about was r_worldlights not r_pixelfog