PlanetKit week 4: filing off some rough edges

Fixing the display of voxels that straddle chunk boundaries, and chipping away at the most obvious overdraw.

PlanetKit week 3: hexagons!

Turning the surface of the planet into a map of hexagonal voxels.

PlanetKit week 2: basic terrain

A first attempt at making terrain for PlanetKit using the `noise` crate.

Introducing PlanetKit

Colorful blobs against the void of an empty z-buffer.