Lighting bug after placing a 3D skybox

[dabmasterars]

Some areas of my map have weird lighting, the 3D skybox itself is fine. Please help me fix it.

 

[Midlou]

The 3D skybox is too small. You need to increase the size. The 3D skybox will cast shadows in the map, so the size of the 3D skybox geometry must be at least the size of the map. Just in case, make it bigger.

 

[dabmasterars]

you were right about the 3d skybox. one of the skybox brushes overlapped with normal geometry. i compiled with no skybox recursion and everything is fine now