Possible uses for volumetric display LED-cubes and what should they be? : led

1.Some kind of (stereo)vision test by a doctor in a hospital, to test braindamage or eyes?

2.Playing 3D-tetris (which has existed 2 decades or more, for normal 2D-screens)

3.Some kind of security display that can’t be seen far away. For example, numbers and letters pop out one row from same color background so seeing them requires depth perception from close.

4.Teaching basic 3D shapes in a school.

5.Displaying details of pieces of map if there are elevation differences.

What should they be?

Resolution is more important than color range. Better to have bi-color bitmap on-off LEDs with one more row in size than 24 bit colors with lower resolution.

Supports / wires should be strongest material per volume, which is rare need because usually strongest per mass is wanted. That may be some kind of tungsten alloy on higher end, and cobalt or iron alloy on lower end…

Wires painted with blackest paint available.