hammer paintings

[Twist.vmf]

so i have been working in the l4d2 SDK and i want to put paintings on the walls of a room but there is a problem, what do i make the model so that when i shoot it or if an out side force shakes it it will fall! like in CS:GO or you know, real life?

thanks (p.s sorry that this is not tf2 related)

 

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