Everything completely covered in white?
Then you need to edit your fog:
Go to fogs(NW4R) and edit the nodes there. Float1 is the distance where the fog starts (it can be negative, so you're always inside the fog), and float2 is the distance where the fog is completely opaque. Red, Green and Blue are RGB. The RGB color (use any image editor to know about that) is just 3 different values from 0 to 255 that make a color together. With the red, green, blue values in any image editor like photoshop or paint, you will be able to give any color to your fog. So you only need those float1 and float2 values for the position, and the red, green, blue for the color. Easy, simple and awesome xD
Make it so float2 is, say, 10000.