Abstract: A method of assembling a three-dimensional display apparatus involves providing a support unit, made up of a projector mounting and a screen mounting surface having a first aperture therethrough; and a screen unit, made up of a diaphragm and an inflatable screen affixed thereto-the diaphragm defining a second aperture in communication with the inflatable screen. The screen mounting surface and the diaphragm are brought into contact so as to align the first and second apertures; and to secure the support unit to the screen unit to thereby create a seal between the support surface and the diaphragm around the first and second apertures. The seal being sufficiently gas tight to enable inflation of the screen.