No. Any metaballs generated with Blitz really just generate a 3D mesh, which is hollow.
If you want a 3D object you can move through, and view the inside of then what you want is voxels.
Voxels are basically little cubes, or quads that are rotated to face the camera. Each voxel represents what the color of the object is at that point in space.
Individual voxels will dissapear though if they pass beyond the camera. If you want volumes that appears totally solid, then you'll need to clip cubes against the near camera plane and reconstruct the surface there... I would reccomend having a specific surface just for capping polygons. You don't actually have to cut the cubes apart, just create new polygons inside them on a new surface that will lie flush with the camera view. But that won't let you view it from far away and slice a portion away, which seems like it would be much more useful.
There's a lot of ways to do what you want to do really, and none are particularly easy, and making it fast too is a challenge.
If you want a 3D object you can move through, and view the inside of then what you want is voxels.
Voxels are basically little cubes, or quads that are rotated to face the camera. Each voxel represents what the color of the object is at that point in space.
Individual voxels will dissapear though if they pass beyond the camera. If you want volumes that appears totally solid, then you'll need to clip cubes against the near camera plane and reconstruct the surface there... I would reccomend having a specific surface just for capping polygons. You don't actually have to cut the cubes apart, just create new polygons inside them on a new surface that will lie flush with the camera view. But that won't let you view it from far away and slice a portion away, which seems like it would be much more useful.
There's a lot of ways to do what you want to do really, and none are particularly easy, and making it fast too is a challenge.