how to put a 256 * 384 tile image into a 256 * 256 tile grid without out of the grid bound

Godot Version

v4.6

Question

Hello,I download some tiles from itch.io( Hex and Tile Terrain Sample Set by David Baumgart ),the size is 256 384,how to put the tile image into the 256 256 tile grid.You can see the picture below that the tile image is out of the grid cell.

Crop the image in an image editing app.