A modified version of 3DSage's Alien cube - https://www.thingiverse.com/thing:1741021

I wanted one with the design on all six faces, and that I could choose the orientation of said faces, so i imported the side piece from his into TinkerCAD, messed around with it a bit, and beveled all the edges so you could rotate it by 90 degrees if you wanted. I also made a mirrored version. Then I made a central block that they would fit onto, and made adjustments to his lid and lid diffuser to make them fit.

i would suggest that you set your printer to have a short z hop on movements, because there are a lot of movements when printing the faces, and i swear i printed about 13 of them before turning z hop on, and they almost all failed, but after i turned it on, i got 5 good ones printed, with no problems other than them needing a bit of a shave when they were done. didn't even need to sand them cause i liked the way that they looked with the concentric surface fill pattern.

All the parts are in individual files, along with alternate lid and face designs using the voronoi shape generator from Tinkercad. I suggest printing the core and lid diffuser with either translucent or white filament if you're going to put lights in it.

I've printed one, and can confirm that it looks pretty neat. i printed mine entirely with clear pla, and then spray painted the faces and lid, then after they dried, glued the thing together with super glue, and now it's just sitting on my desk while i wait for the LED's and bits that i ordered to arrive.

IMPORTANT!- bwillz85 had trouble with the core part, where the first perimeter layer, which should be on the first layer, was being placed on the second layer. which if you're not completely new to 3D printing, you'll understand is bad. he fixed it by cutting a tiny bit (.5 mm) off of the bottom of the model, so if you have had that part fail, check to see if you're getting the same problem.