Prop_physics's Collisions.
Wall of text ahead!
Hi, I've tried searching for a solution to this issue.
I have 4 prop_physics_override's. They each have the model of a different part of a hanging_walkway. Anyway, through the use of a logic_auto, i've parent them all to one of the props (the middle one). Now this all works dandy, but while they all stay together when they move around, the ones which are being parented (the 3 which are targeted) do not use collisions of their own. This is bad, because it means that items can be passed through them, and the edges pass through walls.
Anyway, my question is this; how can I make the parented ones use their own collisions as well? The obvious solution I can think of is to merge them all into a single prop, but I have no idea how I would do this at all. 
If anyone can suggest an alternative solution, or even be a gentlebot and merge the models all into one, I'd appreciate it.
Id suggest an invisible func_physbox with a rough shape of the walkway, with the walkway models (switched back to prop_dynamics) parented to it.
Alright, I'll try that. Thanks.