Many like it but this design is mine. Each panel is 28x24.5cm and the diffuser just snaps in. As above, you'll need 2 m3 nut/bolts to connect each hexagon to another.
Helps to make the diffuser panels out of PETG so they're a little bendy and snap in easier.
Also helps to plan the path of the LED string before you start printing. Look at each of the Hex[letter] .stl for a variety of routing options.
The author hasn't provided the model origin yet.