Hello Bibo4PC,
A few months ago I was doing a scene with fog in the FPSC and faced this problem where the stock characters were not affected by fog effect.
So, let's pick a stock character for example, in this case I chose USMarine (unarmed) character.
First of all, go to File ---> Preferences ---> Visual and select Full Shader Effects (see figure
below).
Now go to Files \ entitybank \ ww2 \ characters and open the U.S. Marine (Unarmed). fpe (see figure below) using FPIEditPad, Notepad or something like that. Note: Make sure you have administrator privileges when opening the file otherwise your changes will not be accepted by Windows Vista or Windows 7.
Before making any modifications in your original USMarine(Unarmed).fpe file, please make a backup of this file and store it in a safe place, because if something goes wrong you will can return to your original file settings.
Then change the original file by modifying the kind of texture (from .tga to .dds) and disabling the row named effect with a semicolon (see figure below)
Save your changes and run the FPSCreatorCleaner.exe.
That's it!
I hope this may solve your problem with fog.
Regards.
Northern