Geometry Problems on Portable Screen with Short-Throw Projector
I've got an Epson PowerLite 450W ("ultra") Short-Throw projector, which is missing its wall mount, so I currently have it sitting on the floor. Unfortunately, even though it has very good geometry on its own, the minor folds in the Da-Lite Insta-Theater projector screen (100" 4:3) lead to some rather unfortunate geometrical distortions on the left and right edges, but mainly all across the top of the image, especially toward the upper-left and upper-right corners.
I've tested it with an old not-so-short-throw projector and found that the issues don't really manifest with that, so I don't think that there's anything too terribly out of whack with the screen, it's just not flat enough to work really well with the short-throw machine. My question is if there is anything I can do to help the screen material return to a neutral shape so that this issue can be reduced or eliminated.