Adding new tile images - Ryue/RedEyesDungeonCrawlerEngine GitHub Wiki
Tile images can be added easily by just adding numerically named .png files into the Assets/Graphics/Tiles folder. Tile images consist of 2 images. The tilexxx.png image which represents the front view and the tilexxxside.png image which represents the side view. For the sizes it would be best to orient them on to the example images inside the folder (or use proportionally bigger images as they are scaled downwards if needs be).
To use the newly added images their numbers need just to be used inside a map file.