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Prepar3d on 4 Monitors with ATI Video
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Author:  theavenger [ 17 Jan 2015, 17:43 ]
Post subject:  Prepar3d on 4 Monitors with ATI Video

I have a single machine with ATI Radeon HD 7950. I have 4 monitors attached to it and they work fine. I can setup Catalyst with two profiles, both working fine: as a single wide Eyefinity screen or as 4 screens next to each other.

When I run Prepar3d in the different modes here is what happens:
- When the monitors are running as 4 separate screens, I can run Prepar3d in window mode or full screen, both perfectly working
- When the monitors are running as a wide Eyefinity screen, full screen mode duplicates the same picture 4 times. Windows mode works fine (but has the borders around it).

What I want to have is the two central screens to be pointing forward (an angle of about 5 or 10 degrees between them) and the two outside screens rotated approximately 45-50 degrees. I can show one image running the monitors as separate screens and full screen mode. The only problem is that the two outer screens distort the picture (as Prepar3d renders them as part of the wide view but not to the side).

I started looking for warping solutions like Nthusim and Fly Elise Immersive Display but I get two problems:
- The Nthusim cannot bend the whole area unless it is one Eyefinity screen (which is a problem because of Prepar3d not running in full screen in this configuration)
- I don't get the idea how I have to bend the things to make them look right.

Does anyone have an idea what software can be useful and how it should be configured? To summarize I want to have a single view in Prepar3d which looks good on 4 screens with the two outside screens rotated about 45 degrees.

Author:  BHawthorne [ 19 Jan 2015, 07:23 ]
Post subject:  Re: Prepar3d on 4 Monitors with ATI Video

My assumption is that you're working with an Eyefinity 4x1 span.

My assumption why you have 4 cloned screens in P3D is that you've not set within P3D the actual spanned resolution and it's cloning a single screen resolution to all the screens. This is typically what Eyefinity does if you have an Eyefinity span but the game has a single display resolution set in it. Set it to the proper Eyefinity 4x1 resolution within P3D and that should take care of the cloning issue.

How many of the displays in the Eyefinity span are projectors? I should be able to walk you through it a bit more once I know more about your setup. We'll get it figured out. No worries. :)

Author:  theavenger [ 19 Jan 2015, 08:51 ]
Post subject:  Re: Prepar3d on 4 Monitors with ATI Video

Thanks for your replay. I will check the resolution once again (I tried to fix it but through the config file, not through the menus and it didn't help).

All screens are monitors, no projectors. 4 monitors in one row.

Author:  BHawthorne [ 19 Jan 2015, 13:49 ]
Post subject:  Re: Prepar3d on 4 Monitors with ATI Video

No need for pre-warping software on LCDs. It's strictly for projector use. The main goal for pre-warping software is to take a flat projection and make it conform to a curved screen.

My guess, changing the resolution within P3D should fix most of the issue.

Custom camera views within P3D are done the same way they're done in FSX. I'm not really an expert on that but places like AVSIM forums or MyCockpit forums should have good information on how to make the necessary adjustments to the camera preferences. You'll most likely need 4 different undocked cameras -- 1 per screen.

Author:  theavenger [ 20 Jan 2015, 14:04 ]
Post subject:  Re: Prepar3d on 4 Monitors with ATI Video

I succeeded to make a setup with the four screens as separate screens, looking for help also here: http://www.prepar3d.com/forum-5/topic/h ... or-setups/. It seems to be acceptable for the moment.

Once I have the setup working I will post back with any issues and/or pictures.

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