I have ver 6.31 on Laptop and my level has fog and all is well.
I have updated to 6.40.5 on this machine, and level builds great,
"no runs, no hits, or errors".
But NO FOG either.!!!

Am using Display00 Ver 2 of 040505 on my laptop

On this machine using

// ---------------------------------------------------------------------
// STARTHEADER
// ver: 4.6
// date: 060518
//
// title: Display
// class: MISC
// type: USER
// image: display.pcx
// help: The display represents the screen that all windows are rendered to.
//
// needs: gid01.wdl
//
// prefix: display00_
// idcode: 00A
//
// ENDHEADER
// -------------------



Here is the section of the Display00 script that addresses FOG settings.

//----------------------------------------------------------------------
// section: Fog Settings

// entry: Fog color Index
// entry_help: Select the fog color from the Map Prop panel in WED.
// cntl: spin 0 5 1
// id: 52
fog_color = 1;

// entry: Fog Start
// help: Percent of clip_range until fog start
// help: There won't be any fog closer than fog_start
// id: 50
camera.fog_start = 75;
camera.fog_start /= 100;
if(camera.fog_start < 0) { camera.fog_start = 0; }


// entry: Fog End
// help: Percent of clip_range until fog end
// help: The world will be all foggy beyond fog_end
// id: 51
camera.fog_end = 90;
camera.fog_end /= 100;
if(camera.fog_end < 0) { camera.fog_end = 0; }

camera.fog_start = camera.fog_start * camera.clip_far; // fog at 80% of clip_range
camera.fog_end = camera.fog_end * camera.clip_far; // fog till 90% of clip_range
}


endif;



----------------------------------------------------------------------

I have my FOG settings under Map Properties as follows:
Fog1 192 192 192
Fog2 128 128 128
Fog3 56 56 56
Fog4 0 0 0


-------------------------------------------
Sun is 0 0 0
Ambient 20 20 20

-----------------------------------------

level looks like a dark outdoor scene with no fog.




My scene in 6.31 looks like this:::



The fog gives the effect of snow, but it is ok with me.

My Project Manager on Ver 6.4 looks like this:::


I just want the 6.40 to look the same as 6.31.
Suggestions...