Earlier quoted context omitted.
Is this somehow distinctive from Dragon Magazine / Dungeon Magazine from the late 80s in a way I'm not seeing? Or eg. the various TSR boxed settings with dungeons?
I never read those magazines and I can't say I'm an expert on dungeon map styles, but it's the hatching done in the dungeon walls that Dyson is known for (e.g., https://dysonlogos.blog/2011/09/03/dungeon-doodles-a-crossha... ). It looks like the person that made this program started playing around with the idea May 9 ( https://twitter.com/probabletrain/status/1259172635776294912 ) a day after Dyson started tweeting a…
https://twitter.com/watawatabou/status/1197194111171940352
(in aother tweet, @watawatabou attributes the style to Dyson, though the idea of doing it programatically).