Quote Originally Posted by SourceChild View Post
In your case, try using a different screen medium to see if the brightness falloff goes down. Also, if you have visual distortion, use the spherical correction tools in the Mix windows.
what do you mean?

brightness falloff is not related to "visual distortion" and nothing to do with 'spherical correction'.

there is a reasonably competant explanation of some of these issues here:

http://www.projectorcentral.com/proj...reens_gain.htm

high gain screens are likely to make very poor surfaces for doing edge blends.
diffuse surfaces which reflect light more evenly depending on angle of incidence are likely to be much better.

Thus seating can be placed in a wide viewing angle relative to the screen and all seats will afford a similar viewing experience regardless of the angle of view. With a high gain screen the brightness of the image increases to those seated in the center, and diminishes for those seated at the outside.
so particularily in a theatrical environment where a wide viewing angle is required - high gain screens are poor choices.