I started mapping a single-player level based on few combined Black Mesa:Source and custom maps when i encountered this error in one of the maps:
Could the problem be, that the entire outside is made out of Player clip?BM;S mappers made it like that.(Or vmex broke something)
Also the some of the brushes render, and all of the props just fall trought the brushes to the void.There looks like there is a leak but i checked the log and there is no leak.
I even placed a box around the map with hollow.