Objects in GMod act exactly the way you expect them to do. They all leave quite a satisfying impression thanks to particle, smoke and other effects. There are explosions, fire, shooting, plane crashing, etc. All in all, GMod's graphics are reminiscent of early Counter-Strike games. They are slightly rough-edged but quite responsive.
It's filled with 3D buildings, NPCs and items. Ever since GMod was heavily influenced by it. Originally Garry's Mod was made on the Source engine. Download Garry's' Mod if you hate limits! Or you can goof around in absurd and ultra-violent add-ons created by other players. Unleash your imagination, pick an idea and try yourself at game design. In GMod you have total freedom at sculpting worlds, arenas, games, scenarios and cutscenes.