I resently herd from a friend that u can add phisics to a solid, something about tieing something to the solid... (like a door) so the door has phisic abilities.... how do i do this?
you mean prop_physics on an entity? or ctrl+t to tie something to brush? not sure of your question.
the only thing i know is to tie something to a brush. i don't know if you can tie something to an entity after creating a prop_physics/prop_physics_overide but I could be wrong as i'm new to hammer.