Originally Posted by kucharsk
Bottom line: my church needs an ALR screen badly as the video is almost impossible to read (mostly slides of hymn lyrics) due to sunlight flooding in from some glass block windows on a side wall.
Even at night the contrast isn't what it should be because of lighting in the room.
What paint mixture would give me the best visibility and the best gain?
The curves on the first page don't make sense to me as the "recommended" paint for high ambient light seems to have the least gain, or perhaps I'm just reading it incorrectly.
The screen is almost never used in a darkened room, and is typically viewed from quite a distance away.
The first thumbnail shows the image at its absolute best
- dark outside and a minimum of light in the room; most Sundays it looks like the second.
In addition to what BUD was saying above, I have to ask;
would a dimmer image be okay?..because any current ALR screen is going to result in some dimming at the angle your front/side seats are from the screen.
..and, is the projector ceiling mounted or being used on a rolling cart somewhere low?
Originally Posted by sainig
Very informative thread.
Can you please suggest paint for a dedicated(windowless) media room?
I have Epson 8350 Projector at about 16' from the wall, projecting an image of about 159" diagonally (139" x 77").
Image is currently projected on the plain wall(textured and light beige color). I have noticed that from my seating distance of about 17' I don't see any problems with the texture on the wall when the image is projected and hence don't see a huge need to sand the wall smooth. Color reproduction can improve significantly if I paint the wall though.
Thanks a lot in advance.
About what color are the walls/ceiling/floor right now?
Can they be painted with dark colors or partly covered in dark fabric like curtains along the two side walls closer to the screen?
If you can treat the room like that OR if you really like the current image and would simply like a little more accurate color-balance and more brightness, I would suggest getting an:
"inexpensive gallon of interior, flat, tintable Light-Base" (which is exactly what you can tell the store) AND tell them you'd like:
"4ounces or 4Y of white pigment or KX added to the gallon" (which costs $0 and will help give the brightest and most neutral white).
A larger amount of texture can still show at that distance when it's been highlighted by a high-gain or ALR screen (instead of a naturally bright interior flat paint that just uses white/KX pigment). If your walls and ceiling are light-colored and will stay that way and you are bothered by reflected light from the image washing back onto the screen, you'll want to give the screen area a really quick sanding (just to knock down any pointy spikes on some bumps) then spend $10-15 on a 4-or-5gallon bucket of "ultralight drywall compound". This specific compound can be spread over your bumpy area like whipped cream and you simply drag something smooth and flat (like a wide putty knife) across it while it's fresh/wet to make sure it's on there good and there isn't a ton of extra. You'll basically be filling in the gaps between the bumps. Let it dry thoroughly and then give the area another quick sanding and marvel at how fast the compound sands smooth while the bump-peaks act as guides for your sanding to be flat/level.
It's dusty and costs a good $15, but there's practically no way your screen won't get noticeably smoother from it..and the stuff sands crazy fast.
Then I'd use something pretty light-colored and high-gain to keep brightness up at that monster size while fighting some of the wall/ceiling image reflection.
I'd suggest buying a whole gallon of the flat-grey you'll use with the metallic so you can first pour 2quarts into a separate container, add about 14-16oz of water into the 2quarts, and roll that onto the smoothed wall following the weird rolling directions in the first post of this thread..the paint may run, so protect the area below where you're painting (I like using tape and cut-open trash bags if I don't have regular plastic handy).
Then after that's dried for a few hours you can apply the mix of metallic and your grey (with no water..running in this mix would be very bad) once again following the rolling instructions from the first post of this thread.
Walmart and 2quarts of their Disney/Glidden magnificent metallic (shaken but no tint added) and ColorPlace flat-grey options would be a little cheaper at $40 altogether, but HomeDepot and a gallon can of their RalphLauren tintable silver metallic (shaken but no tint added) and Glidden pro/professional flat-grey options aren't a lot more expensive at around $60 altogether.
In a separate container, mix 9oz of flat-grey"Veil" with 2quarts of metallic (either 2cans of Walmart/DisneyGlidden metallic or half a gallon of HomeDepot/RalphLauren metallic) which should give you a bright and a little forgiving mix that can subtly fight against the light-colored walls/ceiling reflections.
I would suggest darkened walls/ceiling and plain bright Light-Base +KX painting the screen over smoothing and metallic+grey painting the screen.