Soon, Debevec said, the digital version of Gutter could be projected into a classroom and questioned by students.
The Frenchman Émile Reynaud in 1876 adapted the principle into a form that could be projected before a theatrical audience.
An elaborate set was dominated by a large, ribbed screen on which slides and film footage could be projected.
The images in turn could be projected onto a screen for multiple uses in a studio or stage.
They conceived that positive legislation of their demands could be projected into the past by attributing it to popes and kings long dead.
Planners envision a mix of shops, restaurants, housing, entertainment offerings and a multimillion-dollar water attraction, featuring fountains and a water screen onto which images could be projected.
Other, more extreme experiments with two-dimensional media followed, including a series of small paintings on glass that could be projected as colored light.
Lang and Hunte employed the cinematographer, Eugen Schüfftan, who developed a process whereby Metropolis actors could be projected, through mirrors, into miniature sets.
Lighting and patterns could be projected onto the walls to "mitigate the effects of claustrophobia, disorientation and tiredness", it suggested, adding that simulators could be used to test drivers' responses before the tunnel was constructed.
