They've also used a saucer shaped one, completely covered in LEDs (like completely covered in "TV screen") with hundreds of cameras that would project the background to the front, making it appear invisible... From all sides.
Packed with serious computing power and communication gear, it could track EVERY single person, vehicle and moving object SIMULTANEOUSLY, giving a live picture AND continuously updated analysis of the situation and predictive probability of what certain forces may do next, in the "theatre".... since the early 90s, BTW.
They've also used a saucer shaped one, completely covered in LEDs (like completely covered in "TV screen") with hundreds of cameras that would project the background to the front, making it appear invisible... From all sides.
Packed with serious computing power and communication gear, it could track EVERY single person, vehicle and moving object SIMULTANEOUSLY, giving a live picture AND continuously updated analysis of the situation and predictive probability of what certain forces may do next, in the "theatre".... since the early 90s, BTW.