>>8704405for the background i just duplicated the blank space on a wallpaper i had lying around. for the actual building floor though i just picked a color and went over it with another color in a weird brush pattern and light stroke strength
i'm pretty way with the way it looks. everything is a little small but everyone will be zoomed in on themselves in tabletop simulator anyway.
if i'm feeling ambitious i'll try scaling it up some once i've got everything laid out