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ultima-exodus / U3_Image_File_Format

Ultima 3 has four "image" files that are used for various in-game cutscene-like moments.

  • FOUNTAIN.IMG - Dungeon fountain
  • BRAND.IMG - Dungeon mark
  • SHRINE.IMG - Ambrosian Shrine
  • TIME.IMG - The Time Lord

The image files are 120 bytes each and consist of a 10x12 array of tiles. Each byte is an index to a tile in a SHAPES file. Thus, the "image" is constructed entirely of map tiles. Values are organized into 12 rows, with each row containing 10 tiles. Once the end of a row has been reached, the next byte value references the first tile of the next row.

Note that each value in the image file data directly references the tile index, unlike values in the U3 Maps File Format which are multiples of 4.

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