terrible model clipping

Hello, i just downloaded and loaded up Black Messa for the first time. I had it on the lowest settings possible for best performance, and noticed severe model clipping all over the place in the initial train ride.

I tried upping the settings gradually, until i was at near max settings. My computer was still running it mostly fine, with little lag, but the clipping was still all over the place.

What can i do to fix this?

Thanks in advance

Anyone? please

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.