Basic sculpt tool, refactored common material bits in tools.
Render voxel cursor on heightfields, too.
Comment fix.
Clear terrain under dual contour surface edit.
Gradual progress on converting heightfield portions to dual contour data.
Merge branch 'master' of https://github.com/highfidelity/hifi into metavoxels
More progress on voxelizing heightfields.
Merge branch 'master' of https://github.com/highfidelity/hifi into metavoxels
Merge branch 'master' of https://github.com/highfidelity/hifi into metavoxels
Basic heightfield conversion.
Merge branch 'master' of https://github.com/highfidelity/hifi into metavoxels
Merge pull request #3621 from ey6es/metavoxels

Sculpt brush, very rough conversion of heightfield patches to dual contour surfaces on edit.