There's also Marching Tetrahedra which wasn't covered by the marching cubes patent and was kindly allowed to be used freely (and had some small improvements). [

There's also Marching Tetrahedra which wasn't covered by the marching cubes patent and was kindly allowed to be used freely (and had some small improvements). [1] [1] https://en.wikipedia.org/wiki/Marching_tetrahedra https://en.wikipedia.org/wiki/Marching_tetrahedra