If you've been having trouble with Garry's Mod lately, specifically the error, "Unable to shade polygon normals," don't take it to the Steam forums. You can solve that issue rather easily -- by buying ...
When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Back in 2004, Garry's Mod turned Valve's Source Engine into a toybox. Its intuitive UI, ...