O Good
point but Do I want it to be opaque or see through for projection.
Opaque for front projection and translucent, not transparent, for rear projection. A black surface will provide good
image contrast but low
image brightness and poor color rendition. Open weave
Sharkstooth scrim is often limited for rear projection and even in some cases for front projection because as you stretch the fabric you get rather large openings in the weave, which means a lot of the
projector's light and the
image passing through rather than being displayed on the
scrim. There are some specialty
scrim materials available that may work better for projection.
Not knowing how large the images are or how much ambient light might be hitting them or how much of the light may
pass through the '
screen' material, you could indeed need a very bright
projector to get a usable
image.
Are you always wanting to display the same
image on both screens? Or might you want to display the same images on the two screens at some times and different images on each
screen at other times? Or would you possibly spread a single
image across the two screens? The combination of these capabilities that is desired can define what hardware or software may be required.