The UK’s Marcus Johnson has a new 2D RPG Random City Map Generator for just $1 on ArtStation, and the licence allows… “up to one commercial project (up to 2,000 sales or 20,000 views).” It hooks into the free Substance Player, and needs it to work. Not sure what the output resolution and anti-aliasing is like, but presumably one could wrangle these into an isometric view and then pop 3D rendered PNGs on top.