|Help||Use /help #fill|
This command fills the area completely with any block - also random compositions of metadata.
Use --shape sphere to fill in the shape of a sphere or circle instead.
Note that this also functions as a replace command by offering the second parameter (positioned block expression).
--flood <directions> Edit
This command floods the material around it with any block. This is useful for filling unusual shapes with a kind of block, for example lakes or houses. By default, all air blocks are flooded, but this can be modified by providing a source block expression parameter.