In my setup I did play around with it. There is a more professional way and you can buy a software from Fly-Elise for planning your design aswell, but I tested it once and could not get running with it. So invested my time in testing the positions physically instead. Since my beamers are directly facing each other one might think their projection gets blocked in the upper field badly, but in fact they do that much project up or down (depending how you mount them) that this is more or less no problem at all. With this setup I could fix them to cover 270° of view which is just amacing and let’s you even have some slight rear view. Only addition necessary to the screen was implementing a sliding mechanism for both sides making it possible to access the window left and the door at the right.
You need additional software that helps you correcting the distorted image that is available originally. There are just a few options and I did pick https://fly.elise-ng.net since they are used often and have a little more attractive pricing. I did start first with Display Pro only which just allows limited precision for complex curved screens. I did try to cope with it but since my field of view in my 270° horseshoe setup ist hat much curved you need a perfect alignment to be able to fly a clean traffic pattern. Here you need to buy a second piece of software called Calibration Pro from Fly Elise. It is used just once when you set up the screen and it needs a networked PC to enter the calibration positions. It allows for additional camera positions which is in my setup necessary. There is a tutorial PDF that is needed to get going. Actually I did not understand everything that was asked from me in the tutorial and I am sure there is much more what the software could get out of my setup. Still now with multi view setup (using 3 windows in P3D with 3 different cameras that are then merged to one image) it gets even more difficult since the blending is way more tricky now. I also believe that my curves are that much narrow, that you need to be really advanced with this software to get it done perfectly. I invested a lot time and even physically marked every spot with a laser and a mask on the screens, the result is good and I might now live with it for the next time. What counts is the immersion and it is really stunning.
There are two major downsides of my setup: First one is the heat produced by the 3 projectors. It really gets warm quickly and the air in the (technically ventilated) room is gone pretty fast. So I would not recommend being there for hours (luckily my time with the sim is that much limited that this is not a big issue currently). There would be the need to make some extra extraction ventilation to get the poor air out of the small room quickly.
Secondly the image is way to bright. The screen would ideally be not white but maybe gray to absorb light and get better constrasts. I did also paint the ceiling of the room black to get rid of white areas with potential for unwanted reflections. Still 3 strong projectors in such a narrow space with a screen that was originally not meant to be a screen surface generate a lot of light. Also here I am still not planning to change this extensively as the current result is good.
A future idea would be going for 3 ultra large (curved?) lcd screens. They would have the option to use 4K, but 3 times 4K would not be possible to feed through a high end system – at least today. They would generate better visuals, but could by far not cover every view that is – more or less – covered through the current installation. And there would be unwanted edges oft he screens together with some substantial screenst hat might block the sides where window and door is. So I think the current setup ist he optiomal situation and the downsides are something I will live happily with.