The original Quake is one of my all time favorite games. Here's a highly detailed recreation of the teleportation slipgates from the game. Can be printed as one piece, or as separate parts and fitted together after printing.
This was designed from scratch using various screenshots of the slipgates and a little bit of improvisation, while staying very true to the original. Hope you like!
The scale of the STL provided is small and likely needs to be scaled up. I printed the example at 150% scale on an Anycubic Photon (grey resin, 80 sec exposure for 8 base layers, 12 sec exposure for rest, supports).