1. Go to the corner of the map.
2. Remove one block from the corner with the "Delete" key
3. Use the keypad on the keyboard to extend the area what you deleting.

From the voxedhlp.txt :

KP1,KP2,KP3,KP5 Move mini-cursor Forward/Backward/Left/Right 1 unit
KP4 Move mini-cursor Up 1 unit
KPEnter Move mini-cursor Down 1 unit

I've been trying to sort out something similar to this myself. In theory, I think you are suppose to set up 3 or more numbered-cursors (choose a single point, hit space [backspace to delete], and then repeat this step) and then hit shift-W to delete a wall-shaped layer. Or shift-SOMETHING to delete the shape you are trying to delete. Shift-C is "delete ceiling, but I have no idea what that means precisely.

Kind of clunky at best. What I am reading this is in the voxedhlp file under Advanced Editing. Hope this helps some.

Edit: Just tried the number-cursor method and it works. Use pageup pagedown to thicken the layer of deletion.

Bumpy bumpy dwarf!

I was thinking of making a custom map, but i have a question. What is the fastest way of removing layers of voxels in the editor? I cant place any on the gray top because thats the height limit. Is the fastest way just spamming "end"?

-SB