I have never had trouble with any actor being able to visualise things. They are amazing. As long as you have your monster head on a long stick so you can hold it up there and you can wave it around and let them see it and explain it to them they are just great.
I worked with my dad for 15 years. I apprenticed under him and decided I wanted to become an architect. So I went to college for it and then the acting bug got me.
