Using the Flood Fill tool

Use the Flood Fill tool to fill a contiguous area of empty cells or identical tiles with a selected tile.

1. Select the Flood Fill tool from the toolbar, or by pressing its shortcut key G.
   

2. Select a tile from the Tile Palette window.
   

3. After selecting a tile, selecting an empty cell on the tilemapA GameObject that allows you to quickly create 2D levels using tiles and a grid overlay. More info
   See in Glossary with the Flood Fill tool will fill all contiguous cells with the selected tile.

4. You can also select a tile on the tilemap with Flood Fill tool, and the tool will fill all contiguous cells with identical tiles with the selected tile.