No. A gain below the reference describes lower measured brightness in that viewing direction. Screen color, optical structure, room light and projector performance determine how dark scenes appear. Do not choose a low-gain screen solely to improve black levels without checking the light available for your image size.

Further reading: Screen buying guide

Consider it as part of a material matched to the projector and room, including compatible UST optical surfaces where appropriate. Evaluate brightness and uniformity from all seats. A low-gain rating does not establish UST compatibility, acoustic transparency or ambient-light rejection by itself.

Further reading: Screen buying guide

It can change on-axis luminance, but compare the viewing-angle and uniformity tradeoffs of the actual surface. Gain concentrates or distributes reflected light; it does not create projector output. Estimate luminance from useful lumens, area and the specified gain, then test across the audience. A material that helps the central seat may produce a different result at the sides.

Further reading: Screen buying guide

It describes the direction where measured brightness falls to half the reference peak under the stated geometry. Check whether the published figure refers to one side or the full viewing cone and whether horizontal and vertical behavior differ. Compare those directions with the real seats and projector position. A single peak-gain number cannot tell you how uniform the audience’s image will be.

Further reading: Screen buying guide

No. Gain describes reflected brightness in a specified direction, while ALR describes how a material treats light arriving from different directions. Color, texture and optical construction also matter. Choose a surface whose supported projector geometry and seating region fit the room, then compare it with the actual lights on. A high or low gain value alone does not establish an ALR capability.

Further reading: Screen buying guide