This is really nice! I assume it's for commercial use, as no restriction is mentioned. Do you plan to make interior tiles with this, or other themes in the future?
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In my game, I allow the player to go inside a building but then create a complete separate room that's way bigger. It's obviously not to scale but this gives them a lot of interior area to explore. I agree that it wouldn't work for people who make the walls transparent and limit them to just that space. So, it could work for some setups.