help needed for finishing basement for projection use (1 Viewer)

[Brian Pokosh]

I'm using an Infocus X1 in my basement, which is roughly 30'x14'7'. It has a drywall ceiling and concrete walls, both painted white. While it is 100% light controlled, I think there is still way too much light bouncing around the room from the projector. What are the best options, for both the walls and ceiling, for absorbing light?

 

[Glenise]

I have sheetrock walls and use Glidden olive green satin on my sides and rear walls.
I use Glidden flat black on the ceiling and screen wall.
My sheetrock screen is Behr "ultra pure white" that was converted to Behr "gray tropics".
I used satin on the sides and rear because if anyone touches the walls I can just clean them up.
I initially was going to use flat on all walls.