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UDK Exponential Fog Query

polycounter lvl 9
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AGarton polycounter lvl 9
I'm having a bit of trouble with my ExponentialHeightFog in UDK. I've gotten the fog and lighting looking how I want, but there's a section of brighter fog that is in an undesirable position:

This "orb" of light is quite close to where the player will be standing and I need it to be behind the big building so that it casts a silouhette. I know it's linked to my DominantDirectionalLight's rotation, but I can't work out how to move it further back, towards the edge of the map.

This is the above view:

HOuLT6j.jpg?1

This is what it currently looks like from the player's vantage point:
Ucy1GB1.jpg


I want the bright fog to be behind the building rather than between it and the player. Hope this makes sense. Big thanks in advance for any suggestions.
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