no, you can use something simple. there is a code for volumetric fog in the AUM's, i oprigianlly used it for my levels, no loss of framerate or anything. i would post the code i use, but it is for A6, not lite-c. of well, here it is anyway, maybe someone will convert it.

Code:
//////////////////////////otherfog///////////////////////////////
action fog_layer 
{ 
     my.passable = on; 
     my.transparent = on; 
     while (1) 
     { 
          my.alpha = max (0, (camera.z - my.z) / 20); 
          wait (1); 
     } 
}




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