I did a search on this thread but could not find a discussion regarding the best settings to use for 3D.
I have a CIH setup on a Screen Innovations Solar 4K ( 1.37 gain) 2.35:1 @ 120" diagonal.
The projector is 13.5 feet from the screen, the room a bat cave and dark flat colors all around.
2D is perfect without anamorphic lens and zoomed to fit the 2.35
3D using 16:9 AR makes a 96" diagonal screen but I find it too dim still.
Dedicated Theater: Sony VPL VW5000 , Panamorph DCR & ISCO III L Anamorphic Lens, Draper TecVision XT1800X Screen, 2.40:1 134" diagonal curved , Denon AVR-X8500 , 9.2.6 Atmos, Panasonic UB900, Oppo 203, Lumagen Pro 4440 , (3) Paradigm CI Elite E7-L+C+R fronts, , (2) CI Pro P80-IW Rear, (2) Paradigm SA-ADP In-wall Surround, (6) SIG-1.5R-30 v.3 In-Ceiling, Subwoofers: (2) SVS SB-16 Ultra , (1) SVS PC13-Ultra .