I am installing a 38x38 glass shower stall. On corner od the square is a rounded 45 degree. I am putting a dropped lower false ceiling over the shower. How do I make the round 45 degree vertical to meet the two 8 inch sheetrock walls leading to the curve. Is there any "bendable rock" tp do this, or do I wire mesh and plaster it? Thank you. John Basile from Trenton,NJ

You can try to use 1/4" drywall. You may need to go to a lumber yard other than Lowes/Home depot to find it.

Using a spray bottle, dampen the drywall so it becomes more plyable than it already is and carefully bend it around the wall you want to cover.
It may be necessary to make a form and gradually bend it for a day or 2 depending on the radius your trying to bend.