Originally Posted by Fa11ou7
Sorry for the double post but apparently I can't edit yet.
The website has been doing that for a while now..it's weird.
I will give this a shot, I was holding it off center to get an idea of what it would look like and it just looked darker all around.
At the edge of a projected image the projected light hits the screen at more of an angle..so it gets partly rejected just like angled incoming ambient light.Whether the light is from a projector a lamp or the sun, the sharper the angle the more it'll get rejected and the straighter it hits the screen (like a source slightly above or behind your seated head) the less it will get rejected and it'll instead get sent mostly toward the seated viewers.
Because light from the projector hits the screen like like a widening cone/pyramid, only the center is super straight..the rest is more and more angled.
The only saving grace is when it's a whole screen and there isn't any brighter surface sharing the image, your eyes tend not to notice that the screen is dimming as it goes toward the sides..Instead your eyes tend to notice the brightness toward the center and as long as the dimming toward the sides isn't too jarring or extreme/fast, they'll ignore it for the most part.
I think the issue might be that I don't need an ALR screen at all because the source of any light in the room is either coming from the projector or from ceiling LEDs on the other side of the wall that we are projecting on to.
It sounds like you have been doing fine without one, so you're likely right. A more subtle one might be able to help a little without dimming as much, but that may end up being a needless expense if you're already quite happy with the current screen.
I'll take some shots and post them tonight when I get home.
I'm looking forward to seeing how this looks. I don't think there are any screenshots showing this particular mix yet.
It seemed way to dim, pretty much like it was sucking a good portion of the lumens out of the image. Honestly it didn't even seem to reject light much better either but maybe that was because there is no direct lighting in that room. Hmmm, the ceilings are vaulted so maybe that is why the light colored walls don't seem to be affected by it much, pictures should help.
The larger room will make the light-colored surfaces matter less..they'll do less harm because they're farther away.
The edges of the image/screen don't reject nearly as much light as the center, but even then the 3:1SealGrey isn't a super aggressive mix.
The lighter wall paint does washout blacks some but color is quite vivid on it.
This is why you might still benefit from a lighter-colored ALR mix, but it sounds like getting an inexpensive surface (without a fight) is a challenge.
No, thank you for putting this thread together. I only used a fraction of the two quarts that I bought so if I can get a larger piece of cardboard to paint on I can use it up making a bigger sample. I actually have some sheetrock mud that I could use to smooth the wall out but my wife would kill me if I painted over the wall as it is our main living room. She wouldn't even let me put gaff tape on the wall to frame the screen.
If you can get a big enough piece, try projecting on it so the image doesn't overfill and spill onto anything lighter.
I wonder why hanging a screen (I'm assuming putting some mounting holes in the wall) would be less of an issue than some tape and/or paint that could be removed or painted over..either way while it's there there's going to be a big rectangle on the wall.
I wonder which part she doesn't like.