Quickly create a full TileSet on a TileMap with a single texture

QuickTileset.gd

tool
extends TileMap

export (Texture) var _texture:Texture setget _set_texture

func _set_texture(value:Texture) -> void:
	if not Engine.is_editor_hint():
		return

	_texture = value

	if tile_set == null:
		tile_set = TileSet.new()

	tile_set.clear()
	for id in tile_set.get_tiles_ids():
		tile_set.remove_tile(id)

	var cells_h := int(_texture.get_width() / cell_size.x)
	var cells_v := int(_texture.get_height() / cell_size.y)

	for y in cells_v:
		for x in cells_h:
			var index:int = (y * cells_h) + x
			var rect := Rect2(Vector2(x * cell_size.x, y * cell_size.y), cell_size)

			tile_set.create_tile(index)
			tile_set.tile_set_texture(index, _texture)
			tile_set.tile_set_region(index, rect)

	property_list_changed_notify()