What was worn under the sheet to keep its shape? I imagine a lot had to be engineered to hold it in place. I’ve heard mention of a helmet.
Because David didn't want to see the eyes, we needed something to give that empty impression. We discussed it feeling endless within the sheet, so I wanted to create concave eye sockets out of a black fabric that the actor could see through. I first imagined using goggles of some sort. Soon though, I realized goggles would change the shape of the face underneath and we would eventually need an entire head to keep the new face shape smooth. So came the helmet.
When we did our first camera test with a prototype sheet and helmet, we soon realized you could see legs and feet when he walked. So we used a very full petticoat and grey overskirt to fill in that space between the legs and also help keep the front edge of the sheet clear of Casey's feet as he walked. There are a few moments where you can see the underskirt through the open side of the sheet, but because the feet are hidden, you don't really notice.
After the first couple of days shooting, we were having a hard time keeping his eyes from collapsing on themselves. It was taking a lot of time and energy to reset him for every take. So we used tiny stitches to attach a thin piece of grey lining around the eyes and eyebrows to hold the folds in place. This was then attached to the helmet with hooks, making the different sheets (we had four) interchangeable for one helmet. This was our last engineering discovery, but was one of the most important additions to complete the ghost.