The screen we own is a Stewart 150 RP screen that is a neutral grey with a gain of 1.4 and excellent viewing angle. We used it at a Macy’s corporate event with non 3D powerpoint and imag as well as passive 3d content. The screen represented all colors with excellent fidelity as long we hit it with enough light. As far as viewing angle of the 3D effect our client was very sensitive to that same issue. The event was in the MSG theater in NYC and we had approximately a 100 degree viewing cone. Although the effect was lessened at the extreme edges of the audience it was difficult to quantify and very subtle. Suffice it so say that the client was very pleased with the performance of our system.