interface layers if possible. This should always be possible with
soluble supports and it should have been done long time ago.
For non-soluble supports, it may or may not be possible to merge
these layers: They will only be merged if they are extruded without
bridging and with the same layer height.
Fixes Support enforcer interfaces not generated as needed. #6784
or at least some of the issues reported.
Experimental: Added experimental filtering of propagated support columns
to two extrusions, overlapping by maximum 20%.
This filtering step will remove spurious columns that do not support
anything, but the filtering step may remove supports supporting tiny
islands. Those supports would likely not be printable anyways without
the user intervention (extending the supported area by painting).
28de7f5504