The idea was to get the light from the pixels up and dissipate it, so that you get a lot of light using only the LED strip on the edge. To transmit the light I used round acrylic rods which are roughend up in the middle with sand paper to emit the light. The rods are glued into the holes of a square bar and enclosed by satiniced acrylic plates.
Mark the spots for the hole fixtures.
Drill the holes with a mounted drill press.
Mirror strip as reflector on the sides and on top of the acrylic panel.