Well, metaballs are a (primitive) form or isosurface. When these were implemented, a world would open.

See attached example of a strange blob with intenal structure, intersected by a cube. (Example by R. Suzuki om PovRay) Isosurfaces allow to do this without a single vertex and without a single facet, and infinitely variable.

What you look at is a plot of a function with as input a.o. the x,y,z co-ordinates, with the outside of the function being the collection of points where the function evaluates to 0.0. Inside is where the function evaluates to a value >0.0

Isosurfaces combined with the power of the material room. YES!