I FOUND THE SOLUTION OF THE GRAY FOG MYSTERY!!
(Thanks to silouhette
).
You only have to change the extension of the TGA file:
Replace the ".TGA" by a ".tga". That's all...
I changed it, and the version you can download is "Fog-Free".
The script V1.1 is also online, with a lot of neighbor-problems solved. (Again, thanks to Sil).
And I'm so pleased you liked this map, Kristoffer
...
Don't hesitate to put it on the Illwinter site if it deserves it
