Lighting on snow maps Options

[Dudeinabox]

I'm having a wee bit of trouble with my snow map at the moment, it's almost ready for release but the invisible light posts refuse to behave and always come out blocky no matter what I do, I currently have the intensity at about 0.002 and visibility of 1750 on my INGRNLMP and this comes out very blocky and looks rubbish, just wondering if I could have some advice on what sort of settings I should be looking at.

[Ixith]

well usually when i do snowy maps i make sure that the overall lighting level thing to almost nothing as i have found that it causes bad blockiness on snow maps
i will try to help more when i get home as right now i am posting via psp