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A lot depends on how your room is at present, and how you are doing your straight sections of backdrop.If the walls are open studs, there are many possibilities, including a combination of drywall on straight sections, and masonite in the corners, but keep in mind that 1/4" masonite will only curve to about a 36" radius, and you may not wi***o lose this much space in the corners. If the room already has finished walls, whether drywall or wallboard of some kind,and you are going to paint or glue backdrop detail right on the wall, then masonite is a problem.The sheet styrene suggestion you got is the easiest to 'blend in' to the existing wall. If you are going to install a backdrop on top of your <br />straight walls, made by putting strapping over the walls you have, and covering with some other material, then the flooring material suggestion you got is good, too.Whatever curved corners you choose, you will need at least three 'formers' made of plywood or particle board to support the curvature.This is a lot of work. <br />Another and much easier way to achieve a similar effect to what you seek, is to use 45 degree 'straight corners' in the corners,( about 16 to 18" wide, of masonite, smooth plywood, or drywall ),and blend in the two corner joints with drywall tape and filler, or with sheet styrene.This will let you run a 24" radius into your corners easily.Hope this isn't too confusing.Good luck.
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