Yes Caelen, i worked on them one week ago, here is my short explanations i retrieve from test&trials:
version 2
1.000 ;DirectionalFogScalar
0.250 ;AmbientConstant
0.750 ;AmbientFogConstant
0.250 ;AmbientFogScalar
0.500 ;AmbientLevelRebalance : Whole trach mesh ambiant light but crowd
1.500 ;DirectionalLevelRebalance : directly lighted objects but crowd
0.500 ;MinFogBright
1.000 ;FogWetScalar
0.000 ;GreyBlueRampSplit v2 : clouds alpha bound
0.000 ;GreySkyScalar v2
255.000 ;Blue_R : Top colour
0.000 ;Blue_G
0.000 ;Blue_B
255.000 ;FarBlue_R : Horizon colour
255.000 ;FarBlue_G
255.000 ;FarBlue_B
0.300 ;FogBlueSkyLerpFactor
0.600 ;NearFarBlueSkyFactor
-500.000 ;SkyColourCentreDeltaX : reversed from my tools
0.000 ;SkyColourCentreDeltaY : no real effect
-500.000 ;SkyColourCentreDeltaZ : Y axe in my tools
-1.000 ;SkydomeHorizonHeight v2 : horizon height
-1.000 ;SkydomeDomeHeight v2 : under -1:no sky, upper: domeheight
0.000 ;SkydomeHorizonHeightForReflections v2
And here is a shot i already posted somewhere there's not so long (using my cut down Monza track)