   3D level editor using a grid.  Advice or suggestions on how to proceed.
  I'm looking into a quick way of creating 3D levels made up from large cubes (voxels).I've found this to be quite interesting, but it is more focused around controller input as it is designed for the PlayStation 3.Should I go down the same route as the linked video or is there an easier method using the mouse cursor, rays and octree traversal, etc?Perhaps there are other ways that could be recommended?  Has anyone got any videos, websites or ideas they would like to share for a grid based 3D editor on a PC?Thanks guys.   