tileset-catalog

Bootstrap a semantic tile catalog for a custom (non-RTP) RPG Maker MZ tileset by vision. Use when a project's tileset sheets (e.g. Custom_A2.png, an unfamiliar A1–A5/B–E sheet) are NOT covered by the server's built-in catalog, so find_tile/get_tile_catalog return nothing for them and paint commands only have opaque tile ids. Slices each sheet into one labelled sample per autotile kind / flat tile, names them by…