What the hell is wrong with it?

[Timohaer ua]

So, as you may see in the following screenshot, my tf2 hammer map looks darker than the demoman. No light objects was placed so that`s probably not shadows. Also after quick eye check i haven`t noticed a single leak. I have no idea what it is and what could possibly cause that.

If you have any idea what would cause this, tell me please.

 

[Brokkhouse]

Usually TF2 automatically goes into fullbright mode when it loads a map without lighting, for some reason that didn't happen here. You can enable it manually via mat_fullbright 1.

 

[Tiftid]

This map-wide darkness is purportedly caused by either a light, or the map origin, perfectly intersecting the side of a wall.

In your case, it can't have to do with any lights, so check your map's "0, 0, 0" coordinates very carefully.