Weird bug in Eternity map

[printz]

It seems that the sky gets tinted by coloured sectors that are also in view. Observe how the sky in the following screenshot:

has a green tint compared to the same sky below:

I suspect it's the same colourmap that affects the green torch sectors in sight.

Here's the map download link, so you can see the problem directly: http://files.drdteam.org/index.php/files/get/DXrrG70Rz1/ambush.zip