It was pointed out today, by @Alex in the Discord server, that a really quick way to put together a sci-fi map for VTT is to take a Fantasy Map and thrown down some sci-fi elements.
So I put it to the test. I grabbed the first map on 2 Minute Tabletop that drew my eye, dropped it into Affinity Photo, and slapped on some Altered State elements. Boom. 5 minutes and I had this polluted pool and here was a fun space for players to run amok.
It was really eye-opening to see how quickly I could throw a map together when I know that I can spend hours fiddling and doodling over maps before a game.
Anyway, I would challenge anyone and everyone to try it out. Limit yourself to five minutes and see what you can slap together. Just have fun with it 
