I’ve always planned to make the backdrops for Pembroke out of aluminum flashing. Styrene would probably be easier to work, but I feel it will get brittle and start to break with time. Also, aluminum is shiny, which might help to gather more of the horizon light and cast it up towards the sky.
As it happens, at least for the rough work, the aluminum was relatively easy to cut with a utility knife. It just took a few heavy swipes, to get through, or alternatively, a couple of swipes and some bending, or alternatively some swipes and bending and bleeding. There is more to do as I greedily want some of the foreground trees to admit a little of the sky without painting the sky on. However, I was pleasantly surprised when an hour had passed and I found I had outlined five feet of buildings and trees.
Pembroke:87 