One of the most annoying things of the advanced construction with planks is to fill non rectangular areas, such as triangles.
May I propose a mode where, to certain extend, you can "fill" an area with planks, in sort of the same manner as you fit glass on frames, where the plank fills a -say- wood frame made of other planks, wood elements or stone blocks up to a certain area covering limit.
Two images to show what I mean:
Build a frame with for instance wood logs
and then enable the fill tool with a wood plank and it fills it (if the area is not bigger than the biggest allowed plank):
Is this doable? What do you think?
Maybe also possible to 5, 6, ... sides, not just triangles?