In summary, the overlap region is not a fixed number, user can have higher image and use GeoBox geometry alignment to draw the image to the required height but can't enlarge the image beyond projector optical range. It means the maximum image height will be only 2.78m but not 3.0m. If user wants to keep 20% overlap ratio, the image size for each projector will be 4.44m*2.78m. When the screen size is 8m width, then the overlap region will be 4.8*2-8=1.6m width. it will be 33.3% overlap ratio. If user requires 3m image height, then the minimum projection image width will be 3/10*16=4.8m. For example, WUXGA image is 16:10 and Full HD is 16:9. The projection image size from the projector will be determined by the native resolution.

The image size will be also one of the major factor. This resolution is calculated from the pojector native resolution.