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Edge blend vs side-by-side

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Joined: 19 Sep 2017
Posts: 38
Location: Norway

PostLink    Posted: Mon Aug 05, 2019 2:10 pm    Post subject: Edge blend vs side-by-side Reply with quote

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I've been playing around with the idea of setting up two of my projectors together. Since edge blending doesn't play well with console and computer games, I've been thinking of just setting the projectors up side by side so the pictures meet in the middle with 0 blending zone. That would give me a 8:3 aspect ratio, and of course would show black bars on the sides when watching movies in 7:3 AR. I'm okay with that. i could also just crop of the top and bottom when watching movies.

Setting it up would be dead simple. Just extend desktop in windows. No specialized software or hardware required, other than a Windows computer. I wouldn't be able to run games or programs in full screen without using some special software, though.

I have found little to no information on this. Is there any reason why it wouldn't work? Is it really hard to get two projectors aligned side by side without overlapping?

Barco Data 701s - Barco Graphics 808s - Barco Graphics 1200
Please refrain from discussing CRT vs DLP, your opinions on CRT projection, economics, politics or anything similar in my threads.
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Tim in Phoenix

Joined: 21 Oct 2006
Posts: 4321
Location: Phoenix

PostLink    Posted: Tue Aug 06, 2019 1:15 am    Post subject: Reply with quote


What you are proposing is called tiling. If your computer can process every source signal you want to watch, that's nice. You will find it challenging to place the edges together with no error. Does the green convergence on your projectors offer one pixel increments of adjustment? Otherwise you will have a black line or bright line at the seam. Blending has the forgiveness of overlap, and small errors go unnoticed.
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Joined: 08 Apr 2013
Posts: 474
Location: Germany/Saarland

PostLink    Posted: Sun Aug 18, 2019 6:18 pm    Post subject: Reply with quote

What Tim says is common belief and so i use an edgeblending setup myself.
But: I've never read from someone who tried it without blending as you propose.
You could use Nvidia Mosaic to create one large virtual screen using two projectors.
Powerstrip could help too pushing the edges of the two projections together.
I'd like to see pictures and hear your report after trying.
Regards, Julian

2 Marquee 8500U 2001 P43 | Barco 801s LC | NEC 9PG
Self-build 15"-LCD Beamer with 400W HRI bulb
small Teufel 5.1 Audio | HTPC | Pioneer HPM 100
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Joined: 06 Mar 2006
Posts: 16968
Location: Ottawa, Canada

TV/Projector: JVC DLA-RS56

PostLink    Posted: Sun Aug 18, 2019 10:44 pm    Post subject: Reply with quote

There’s soft edge blending software available for reasonably cheap these days too. Given how fast PCs are today it should be simple to do. Here’s one for 180 euro, up to 3 projectors:



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