In short words Michael's project represents a unique combination of our ping pong ball wall with the true color matrix. The result really looks fantastic. On the one hand one has well separated pixels giving you some retro style optics and on the other hand the ping pong ball's capability for diffusing light is perfectly pronouncing the color variety the true color matrix boards can achieve.
Michael is very skilled in mechanical art as well as in design, but have a look by yourself in the pics below. The pitch of the ping pong balls is close to perfection.
See Michael's project page for more pics and further impressive projects (but afterwards come back to our page )