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Hi Everyone,

I've been reading about DIY painted screens for a while now and but I just wanted a definitive answer for a specific question. Is there no DIY ALR painted that will work with a short throw projector (.5:1) throw ratio? Is my best bet then is to use a plain matte grey surface?

Thanks in advance!
 

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I'm no expert, but I believe we will need to know the projector brand & model/light output/distance to screen, and if there if any light issues in the room. Someone should chime in shortly!
 

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The projector is a promethean PRM 30. I want to use it as a tv replacement in the living room with as little light control as possible.
 

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There isn't any DIY ALR screen that's very effective with a 0.5:1 or shorter throw-ratio projector.

A throw-ratio that short means the light going from the PJ lense out toward the sides of the screen will be aiming at a pretty steep angle to hit the sides from that close, and this means a screen that rejects sideways incoming ambient light (like a window or lamp) would also dim the image's sides quite a lot compared to the center which hits more straight-on.

You CAN make an ALR screen that works decently with a 0.5:1 short-throw, it just won't be very aggressive against ambient light.
BlackWidow and its lighter cousins aren't super aggressive mixes, so they can pair decently with a short-throw.
James-ofAZ also has a light-colored version of his GreyPearl mix which worked well with a 0.5:1 short-throw optoma projector and should work similarly well with yours.

There are specialty louvered screens that only reject light from one direction, but nobody has yet made a DIY version that I've heard of..so their cost remains very high.

On the positive side, a plain flat/matte-grey at a modest size is both the least expensive AND the cleanest-looking (and most forgiving to paint) option for fighting a little ambient light and/or helping against room-reflections..and it works great with any projector throw-ratio.
 

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ALR screens tend to narrow the viewing cone, and when performing on stage you want the image to be as visible to the audience on the sides as in the center. Realistically you would need an expensive, industrial strength projector to achieve a reasonable level of performance with any reasonable size screen on an illuminated stage.
 
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