Your primary tools, as an actor, are observation and imagination. You can pretty much get everything you need from that, and you do. It brings back that element of pretend.
On some level acting is the art of pretend and you have to have a highly cultivated sense of imagination. You have to be able to see things that aren't there no matter what aspect of acting, whether it's green screen, whether it's on stage, whether it's anything else, whether you're working on the radio.
In a rehearsal room, your real resource as an actor aren't the things around you; your resources are your imagination and your director and the other actors. In those close quarters, your imagination and your skills are what you turn to.
