I nicked this from the official forums, it's a pretty decent change to the weather on Nords. It works for all the maps but essentially was created to add more atmosphere to the track. Typically it's raining @ Nords in RL, this mod makes it look like it's about to bucket down with rain.
The clouds do look pretty awesome.
Make sure to enable HDR.
Color saturation 89%
Set time to 1600 (I found this far to dark so I ran it at 1100)
Go to :
\Steam\SteamApps\common\assettocorsa\system\cfg
Find two files:
colorCurves.ini and weather1.ini
Backup the two files so you can put them back for other tracks.
Edit colorCurves.ini
Replace all text with the following:
[HEADER]
VERSION=3
HDR_OFF_MULT=0.8
ANGLE_GAMMA=1.6
[HORIZON]
LOW=255,130,0,0.45
HIGH=190,220,248,0.9
[SKY]
LOW=100,100,100,5.7
HIGH=100,100,100,10.4
[SUN]
LOW=255,160,190,0.4
HIGH=255,250,220,0.5
[AMBIENT]
LOW=40, 45, 50,1.0
HIGH=40, 45, 50,1.5
Edit weather1.ini
Replace all text with the following:
[CLOUDS]
COVER=0.8 ; regulates clouds transparency : 0 -> 1
CUTOFF=0.6 ; regulates other colors influencies on the cloud : 0->1 if 1 just the color of the cloud is considered, if 0 just the color effects on the clouds are considered, if 0.5 50% of cloud color and 50% of effects
COLOR=0.3 ; base color, the sunlight, light color and ambient will be added to this : 0 -> 1
WIDTH=2.5 ; width of the quad
HEIGHT=1.25 ; height of the quad
RADIUS=6 ; distance from the center of the skybox of the quad
NUMBER=1500 ; number of clouds
BASE_SPEED_MULT=0.015
[FOG]
COLOR=0.2,0.2,0.2
BLEND=0.8
DISTANCE=1200