The faces are printed one by one and connected using pieces of 1.75mm filament threaded into the hinges.
The diameter is roughly 21 cm. For testing purposes I uploaded a small version.
The fusion360 model can be easily modified. Read "HintsForFusion360Files.jpg" for details (txt-files are not allowed here).
IMPORTANT: I'm using a LED bulb. Less efficient bulbs might get too hot for this PLA print.
The author hasn't provided the model origin yet.