A radar-based system requires more space than camera-based units, and room size is also a critical factor that affects your choice of projector and where to position it. If your space is more limited, that is say within 15 feet depth, a camera-based launch monitor and a short throw projector should be your first consideration. For most home simulation setups you will want a short throw projector, which has a throw ratio around 1.0 or less. That helps you put the projector where it is needed to fill the screen while being mounted safely outside the hitting area (and without casting a shadow)
On the other hand, if you are using high end launch monitors optimized for use with software such as E6 CONNECT or TGC 2019 that support 4K output, 4K projectors should be the only choice. 4K UHD resolution delivers awe-inspiring clarity and crisply defined details that enable you to see all of the minute nuances on the latest 4K golf simulator courses. It also allows your impact screen to double as an amazing home theater for movies or watching the Masters Tournament when you’re not practicing your golfing skills.