Specific Help, I need help selecting material Options

[Wasabi]

I need to find a material that'll work for an invention idea I have. Need a material which will allow people to view a projected image from the opposite side so the projector is not in view. I need something besides the 'Airsho' material I came across on google. I need a relatively cost effective material which will cover a large area (perhaps larger than a movie screen).

[csven]

traditionally called Rear Projection Screen. may be hard to acquire now. used to be used for old filmmaking spfx like mixing stop motion animation with live action. can also use a variety of semi-transparent materials.