So my gmod has these weird shadows on NPCs & Ragdolls and on the .357.
I have reinstalled it twice now, updated HL2, ep1, ep2, and CSS. I have no addons, textures, toybox stuff, anything - it just installed.
I have Killingfloor, And Half Life 1 mods Sven Co-op and Opposing Force (steam) installed. I doubt that would interfere with anything but it may be a problem.