They also come with automatic collision generation for more efficient testing and editing. A brush tool makes it efficient to paint tiles on a grid, and they can be scripted to use painting rules.
This is because tiles can be rendered by a dedicated renderer, and the tiles not visible on the screen can be disabled. Tilemaps can help save time on art creation, as well as memory and CPU usage. This is especially useful for games with large walkable areas, like a simulator or RPG. Instead of designing a level as one big image, you can split it into brick-like pieces that are repeated throughout a whole level.
The Unity Tilemap system enables you to create a game world using tiles, which are small sprites placed on a grid.