This file defines the general behavior of the fog weather effect. AMOUNT indicates the amount of fog particles generated per time frame. DURATION defines the duration of the fog generator before it stops producing fog particles. Duration value is approximately the time in seconds multiplied by 6. X and Y specify the location of the fog generator on the map. U_VEC and V_VEC define speed and direction of the fog particles, U for horizontal and V for vertical direction in screen coordinates. Positive values move fog towards right or bottom screen respectively.

Fog can be defined for individual maps by putting the respective area code into the first column.

In BG2EE we have:

2DA V1.0
-1
      AMOUNT  DURATION  X       Y       U_VEC   V_VEC
1     35      800       4473    583     -30.0    15.0
2     5       400       3611    1637     -3.0     0.0
3     70      400       2560    1920    -20.0   -15.0
4     15      400       1467    940      -1.0    -1.0