[UDK] odd colours on certain meshes.

SaboR1996

as shown here, it is also on a bunch of other meshes. what is this caused by?
the result you see is after I baked the lighting.

Shift`

I can see some blue behind your rock on the right, so I'm going to assume you are using something with a blue-ish light for the sky/environment color. Since your light source that I can see to the left is yellow-ish, it creates green shadows. (yellow + blue = green). So you can do a few different things, either change the environment color, change the amount of bounces for the environment (world settings), or make sure the space is encased behind that wall. (Add BSP behind it)