Voxelmetric 2 is a rewrite from the ground up of Voxelmetric 1. The main aim of this project is to create a performant, easy to extend framework for implementing voxels in Unity.
There is no documentation yet but it will be added to Voxelmetric.net when available. You can contribute to documenting Voxelmetric in the vm-website project.
The textures included in the examples are from Kenny's wonderful voxel pack.