If you ever want to do this more quickly in the future, go to the dollar store and pick up a sheet of foam board. Pull one side of the paper off the foam board, exposing the foam. You can quickly etch in the grid with a butter knife and use a fork to distress squares as desired. If you want to paint it, coat it in modpodge or diluted white glue first so that a cheap, black spray paint does not melt the foam.
There are lots of cheap and fun ideas put forth by DM Scotty on his youtube channel. I have used his videos to make 1-off tiles, wall pieces that can make any size room, gelatinous cubes, GIANT purple worms, and scenery. His intros are a bit corny, but his advice is great.
https://www.youtube.com/channel/UCF-i5kmuwyV6N3xi5z1TElg
There are lots of cheap and fun ideas put forth by DM Scotty on his youtube channel. I have used his videos to make 1-off tiles, wall pieces that can make any size room, gelatinous cubes, GIANT purple worms, and scenery. His intros are a bit corny, but his advice is great.
https://www.youtube.com/channel/UCF-i5kmuwyV6N3xi5z1TElg
I have been doing this for ages, and I usually just use Fat Dragon floor tiles printed onto card stock for my floors. I wanted to have a specific effect with this one, however.
