The first video Amber Ale posted is a great example of what the 2 projector setup looks like.
When you go with 3, you get the "fish eye" effect on half of the two outer projectors, unless the games has good FOV adjustments. Also, its just far too wide, wasted pixels. Also, you can fill more vertical space in the same width space than you would with 3 projectors.
Iv'e found 3 screens is only good for racing AND only if the screens can surround you somewhere close to 180 degrees. So I just mounted 3 1080p 120hz monitors on my motion sim and moved it to the corner of the room.
If you have enough room for it and can get a big enough screen, then 3 projectors for racing is as good as it gets. The PC specs isn't a problem, I'm running 4x 7970s, the issue for me is I don't have enough space to dedicate projectors to my racing rig. I'd have to move my FPS setup out of the way, and I do more FPS than racing. The second video Amber Ale posted is a good example of how much space you need for a 3 projectors racing setup. The further back the rig, the bigger the screen you will need. Want more vertical space for the 3 projector setup? no problem, but again, you will need an even bigger screen. Within the same width of the screen in that second video, if there where 2 projectors instead of 3, you would have quite a bit more vertical for the games.
- I'm using BenQ w1000+
projectors, over 6000 hours (less than 1 year) on the same bulbs and still going. Great projectors, but I put too much time on them, I need LED.
- I'm looking at the LG PA70G or the Casio XJ-M245, I'm not sure about the 120hz on those, connection requirements, sharpness, input lag... I have some time to figure it out. brightness wont be an issue, I only need the screen size of each projector at about 41 inches diagonal.
- I think the LG projectors are about $500 each at FRYs, and the Casio's are about $1000 each. The perfect projectors for me would be the BenQ LW61ST, probably the best 720p projector out right now, and short throw, which would save me a lot of room behind my screen, but they are $2000 for 1. Maybe something new will come out at CES, I'll wait and see.
- Here is a pretty good explanation for the whole 5x1 thing : http://www.wsgf.org/book/export/html/1272
- You are correct about getting my height back with the 5x1 setup. That video was taken when I was using 3 projectors, you can't see it because of the dark room, but I was only using 50% of the vertical screen space available.
- Yes, there are cheaper screens out there and putting it together yourself would be far cheaper. Rear projection is mainly what I know about. I went through many samples from various companies to compare image quality. The Frame is where they get you. If you can make your own, you can save loads. I should mention the quality difference between the different rear projection screens isn't all that big, but because I sit so close to my screen, when I did the comparisons, I was looking closely, very closely.