These Lua scripts automate Tileset and Tilemap import/export.

Both export_tilemap.lua and export_tileset.lua are modified versions of scripts by David Capello. Export IndexedImage.lua is modified from the GameboyExport script by boombuler. Credit to rxi for json.lua. Everything including my modifications are under the MIT licence, feel free to use and modify.

• export_tilemap.lua uses json.lua to export aseprite tile indices for each tilemap layer. The exported active area is visible in aseprite by holding the ctrl key. Let me repeat: Exported tilemaps are NOT for the whole canvas. I don't know how to change this behavior.

• export_tileset.lua exports the tileset into a rectangular png with a maximal row_len. The script uses the tileset that results from copying and flattening all layers of every frame. I use it to create animated tiles that have different backgrounds.

• import_tileset.lua uses layer names of all tilemap layers to import tilesets. For each tilemap layer, a new tilemap layer is created, the tileset is imported from the Tileset_*layer_name*.png file, then the pixels from the old tilemap layers are copied over. This operation is repeated for every frames. Finally, the old tilemap layers are discarded and the new ones renamed to their respective names.

• import_tileset.lua uses layer names of all tilemap layers to import tilesets. For each tilemap layer, a new tilemap layer is created, the tileset is imported from the Tileset_*layer_name*.png file, then the pixels from the old tilemap layers are copied over. This operation is repeated for every frames. Finally, the old tilemap layers are discarded and the new ones renamed to their respective names.

• Export IndexedImage.lua exports raw indexed image to be used for palette swapping.

• import_tileset.lua has trouble importing tilesets to empty layers/cels.