I'm doing my attic home theater on a budget, and am using (mostly succcessfully) black felt on part of the ceiling to minimize projector/screen reflections. Here's a 'before' pic of the room so you can get a sense of the ceiling:
So now that the projector and screen are set up, I did a swath of black felt to basically create a "tent" above the screen. The felt does a really good job of minimizing reflections...not as good as velvet, but good enough for my purposes.
The left side slope and the flat part of the ceiling were no problem. But the right side slope presented a problem as our finished attic's walls are not that straight, so a continuous piece of felt couldn't be stapled to the ceiling without tons of wrinkles being visible. So what I did was cut the right side swath into 2 pieces and mount them separately.
The seam is pretty tight and I was able to color the staples with a sharpie so they don't reflect any light. The problem is, during bright scenes, the seam is a line (where the 2 pieces of fabric 'meld' together) I can see out of my peripheral vision and it's distracting. I'm trying to come up with a way to hide the seam so it's not as noticeable.
Here's a pic of the right side with a dotted line added to indicate the seam (the seam doesn't show up in photos very well at all):
I tried some matte black paper tape that photographers use, which I bought from Amazon:
However, this tape, while not that reflective, is more reflective than the black felt and is quite noticable. Also, it doesn't stick to the felt very well.
Any ideas? I thought about covering the seam with some other fabric, but then I would have two new seams to deal with.