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What is a Penta tileset?

A Penta tileset is a 5-archetype autotile format. This page intentionally tracks the canonical README definition instead of creating a second competing definition.

The five archetypes, in canonical slot order:

  1. IsolatedCell - a tile with all four edges and all four corners exposed; source for synthesizing OuterCorner.
  2. Fill - a tile with all four edges adjacent to the same terrain; the common interior tile.
  3. Border - a tile on a straight terrain edge.
  4. InnerCorner - a tile at the inside of an L-bend.
  5. OppositeCorners - a tile with two diagonally-opposite different-terrain corners.

OuterCorner is implicit. PentaTile synthesizes it from the corners of IsolatedCell at load time, so it does not occupy a dedicated slot.

For the diagram and longer explanation, see the README section: https://github.com/Shilo/PentaTile#-what-is-a-penta-tileset