map completely black.

[Billo]

i have a weird problem where my map is completely black at least all the textures and stuff but not props.
the previous time i compiled and saw my map it worked just fine. i added more stuff like new buildingings or props and when i compiled again i saw the problem. i tried to fix it but hammer says no problems/leaks so i copied and pasted the compile text to the interlopers.net site but there nothing important.
am i forgeting anything? if you know what causes the problem i would be very happy if i got an answear as soon is possible thanks.

 

[Vel0city]

Lights inside brushes can cause this. Or the map origin (the 0,0,0 point) being inside a brush too.

 

[Billo]

thanks for the help i managed to fix the problem