Imposters not affected by light

[Belsnickle]

In my application I noticed a circular area around the camera that gets rendered differently. I am guessing this is the best quality detail level since you are closest to the geometry.

When I added Caelum to my project this effect is very obvious at night as trees that are not in the close proximity to the camera are rendered bright green. Those in the close proximity are rendered dark at night as they should be.

The effect is visible using a regular light instead of Caelum as well.

Edit:

It seems the problem is the imposters detail level. Removing them removes all the bright trees in a night scene.

[paroj]

you could try to colourise the impostors similar to what is done with grass in the samples