Originally Posted by rekbones
Using a level is not enough. The projector is not perpendicular to the screen. Walls and ceilings are never plum and true to the accuracy required to get a perfectly square picture. Never use digital keystone as it will no longer have one to one pixel mapping and degrades the picture. Try pushing or pulling the corners of the screen closer or farther away from the projector and shim to correct the errors. The use of a black velvet border to absorb the minor imperfections in alignment is what most of us do as it is very difficult to get it exact.
Edit: Looks like you have a zero edge screen so adjusting is almost impossible. Using a projector without horizontal lens shift compounds the problem as you must move the projector left or right by fractions of an inch to get it exactly centered and perpendicular to the screen. If your mount doesn't have horizontal adjustment maybe you can move the screen a few inches left or right. This is why I never understood the appeal of a zero edge screen.
Thank you so much for the response.
TBH, when looking for a screen, I didn't really consider it thoroughly. I just thought it looked "cleaner" with a zero edge.
So first, you don't think the projector is defective? I ask because others have mentioned the edges of their units were skewed as well. I am hoping this is not the case because I really don't want to spend months waiting for a replacement.
Second, can you please explain a bit more about using black velvet border? I presume that is not an option for me because of the zero edge.
Third, you think that the projector is not squared to the screen completely. From the pictures above, does that mean the left side is square and the right side is not? Meaning the projector is square but the screen is not. If so, how does sliding the screen left and right help? Shims might be the only option?
Lastly, in regards to shims. Any tips on shimming and keeping them in position? Since the screen is just hung on hooks, there isnt a good way to keep them in place.
Sorry for all the questions and thank you for the help!