Originally Posted by monakh
No, actually, this has been covered quite a bit by those of us who have been dabbling with UST+PET screens for a while. You will lose the ALR benefit because the screens are meant to reject light from everywhere except the bottom. If you hang it upside down (and trust me, I have tried it), two things happen:
1. Your screen goes way below, I am talking 2 or 3 inches above ground which means that the wall has to be completely devoid of all furniture, and you kick your WAF to the curb
2. The ambient light from the ceiling will go right into the screen and mix with the PJ output resulting in a washed-out look. It's not terrible, but it's not as good as when the screen is right-side up
In summary, unfortunately, you do lose the benefits of ALR if you hang the screen upside down AND have ceiling lights that you leave on (I do).
Sure, but you can turn out the lights when you want to watch a movie. You don't lose all of the ALR effect, just some of it. Ceiling height is a determining factor on whether you can make this work, no doubt: You need a 10-foot ceiling minimum to make it work without the screen being too close to the floor, which would negate any advantage for center channel placement.
Or maybe folks need to just accept this projector for what it is, which is not home theater projector. Not a projector for people who spend more on their AVR system than on their display and consider center channel placement a priority. That's really not a problem because the vast majority of people were even looking at something like this do not fit into those categories, which happened to be overrepresented on this site.
Having said all that, I watched Jumanji the next level last night, on the Ambient Visionaire screen with the lights out, and I just could not help but think "wow, this really looks great" on scene after scene. I tried, mentally, to notice judder and be annoyed by it, but even that did not happen. Even with a deliberate effort to pay attention to PQ "issues" most of the time I just fell back into the movie.
I still think the solution for anyone who wants to use a center channel is to set up the system so that the speaker goes in front of the projector. There would be consistent with good speaker placement anyhow (putting a couple feet between the speaker and the wall)