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https://www.codeproject.com/Articles/106884/Implementing-Auto-tiling-Functionality-in-a-Tile-M https://code.tutsplus.com/how-to-use-tile-bitmasking-to-auto-tile-your-level-layouts—cms-25673t https://gamedev.stackexchange.com/questions/32583/map-tile-terrain-transitions-with-3-4-different-types https://forums.tigsource.com/index.php?topic=21237.0