I think the game Teardown is the golden child of voxel rendering in production video games. beautifully lit, fully destructible, and performant

Polygons. It renders the blocks using traditional polygons

Voxels are not a rendering technique. They are an internal representation of the game world as a set of points on a (usually) 3D grid, as opposed to a fully pre-rendered map. Voxels allow for destructibility and full reshaping of terrain, for instance.

Yup, makes perfect sense after thinking about it more.