I'm in need of a ceiling-mounted projection system, for displaying images and video on the ground. I think the easiest way of describing what I want to do is to share this link: http://www.gesturetek.com/gesturefx/productsolutions_groundfx.php
My working area is a rather large warehouse-size room, with high ceilings (20-30ft). I'd like the ground projection area to be at least 4m x 4m (the bigger the better). I'm not too familiar with projection systems, but I think my main concern would be light intensity and image quality, as light intensity drops proportional to radius^2.
If anyone can point me to the best projector capable of handling this task, or a DIY tutorial for this, or any other ideas in general regarding this project, I would appreciate it. I can provide more details if needed.
Thanks all, I appreciate any help!