How to remove the sun from Overgrowth levels?

[Thereafter]

Hey, I'm trying to make a map set at night that doesn't use the same post shader effects as Painted Desert (night). So basically I'm making an ordinary map but I tried to hide the sun under the ground so it wouldn't light much up. However, when I place the sun under the map to hide it, it stills lights up the map normally. I have tried changing the <ExtraAO> value in the xml file and that hasn't done anything either. So I'm wondering how I could delete the sun or something like that...

[halzoid]

double clicking it and increasing the size makes it disappear, I'm not sure if it completely affects the lighting though...

[Phoenixwarrior141]

Make it small and hide it under the map.

[Korban3]

The engine likely calculates additional ambient lighting in the shader. Swapping to a night shader, like the Painted Desert (Night) one will reduce the overall level of lighting.