Black texture on a brush glitch

[dabmasterars]

After compiling the map with final lighting, one of the brushes turned completely black. This is just a regular brush, not a func_brush, not a func_detail. Below images are how it looks in game (compiled with final lighting) and how it looks in hammer. (lighting preview, triggers and nodraw on) Lightmap is set to 16.

Please help me resolve this. Thanks in advance.

 

[Brokkhouse]

On my end this usually happens when the brush is not aligned to the grid, is cut weirdly, or the UVs are weird. All of this can best be fixed by deleting and remaking (not pasting) it back. Also check the compile log whether it says anything about lighting.