[FIX] Fog GLSL fixed.
[FIX] Fog GLSL fixed.

RainsSoft/engine,sanyaade-teachings/engine,maxwellalive/engine,playcanvas/engine,shinate/engine,horryq/engine-1,SuperStarPL/engine,aidinabedi/playcanvas-engine,horryq/engine-1,RainsSoft/engine,aidinabedi/playcanvas-engine,sereepap2029/playcanvas,sanyaade-teachings/engine,MicroWorldwide/PlayCanvas,shinate/engine,MicroWorldwide/PlayCanvas,SuperStarPL/engine,horryq/engine-1,sanyaade-teachings/engine,SuperStarPL/engine,maxwellalive/engine,nizihabi/engine,playcanvas/engine,guycalledfrank/engine,3DGEOM/engine,RainsSoft/engine,sereepap2029/playcanvas,3DGEOM/engine,nizihabi/engine,sereepap2029/playcanvas,shinate/engine,3DGEOM/engine,nizihabi/engine,H1Gdev/engine,maxwellalive/engine,guycalledfrank/engine,H1Gdev/engine