As soon as you use several projectors for use as a large, seamless desktop, having them shown as separate displays in Windows creates several issues. Apart from missing synchronization, the behaviour of any application is not like you would expect - they are not automatically expanded across the entire desktop.
Therefore combining all projectors to a single locical screen for the "eyes" of the operating system is a must.
The feature for this is provided by NVIDIA Quadro graphics as "Mosaic". It is provided by the NVIDIA Control panel. A successful MOSAIC setting for the above shown display setup looks like this:
There are several ressources that explain how to create a Mosaic setup:
- Video showing how to setup NVIDIA Mosaic by VIOSO
- Setup MOSAIC using NVIDIA control panel
- Detailled documentation of NVIDIA MOsaic (PDF)