I've got two walls that intersect. Both are same composite structure:
Stud Partition. Both walls on same layer (layer intersection group is
NOT set to zero). Same base elevation and same height. They will not
show correctly in plan, however I try bre...
Thanks both, @DGSketcher and @Lee Hankins - it was the Building
Materials priority (yes, the walls were already split and correctly
joining. But the 'Air Space - Frame' was of lower priority than the
'Plasterboard', and I had a mental block 臘♂️