Terrain Macro editing - Topographic Style (basic or advanced mode)

Users:
 * Basic users will need to draw in block
 * Advanced users can use either block or brush

Draw lines:
 * from edge to edge to raise entire segment of terrain on one side
 * lakes and hills create circles as the lake drops in depth or hill increases in height

Extrude:
 * each old bottom section up one at time
 * one at a time is required as they are no longer connected after below step is completed

Move below (use drone mode):
 * extrude bottom up until new lines and seen i.e. terrain is 1 voxel deep
 * if terrain disappears, undo and check the step above to ensure terrain is at least two voxels deep
 * extrude down farther if making a lake for example

Move above terrain:
 * extrude lines as desired
 * fill different levels as each is now a unique voxel type

Adding more terrain later:
 * draw a new line of different voxel material vertical on the side to be extended
 * extrude that line the length to be added
 * extrude the new line outward for a new drawing for new blocks to be drawn or painted

Repeat above steps to make different elevated map and fill as desired.