Textures missing?

When I join certain servers I get large red ERROR warnings and purple and black dotted walls… what’s up with that?

The server has addons/games that you dont.

Is there anyway that I can find out what I’m missing and all?

Asking people.

Do you have CS:S if you do do you have Hl2 cause alot of servers use items from both of those games now

I don’t have CS:S

There’s one of your problems mostly since alot of the gmod servers use props from Cs:s