AVS Forum Special Member
Join Date: Jun 2011
Location: Dungeon, Pillar of Eyes
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I believe this is the wrong forum. There's a branch dedicated to screens. But, oh well.
First, there's passive 3D and active 3D. Passive 3D requires screen that preserves polarization. But I believe you have active 3D in mind (using shutter glasses).
Shutter glasses reduces light output approximately by 5, leaving only 20% of initial light output. So I would recommend a screen which compensates for that. There are Mocom screens with 18/23 gain but they have strict placement requirements. There are also various 3-9 gain screen, you should be able to find them in Screens forum branch.