The material we’re currently planning on using is semi-transparent. You can see shadows through it, but no fine detail. When folded, these lifts form something near a triangle atop our robot, so the profile along the long axis is pretty small. Looking at the side of the robot, though, is a lot like staring at a wall.
The gas springs haven’t been attached yet, but under no load, they extend their full length in about two seconds. It ought not take much longer than that to lift a robot since the gas springs operate at a pretty constant force.
The overall dimensions of the flat part of the platform are about 37 x 45". When collapsed, the top is 2.25" from the floor. There will be ramps leading up to the flat portion that ought to be about 9" long.