the behavior of the copy selection area when it comes to angle blocks is somewhat random
and there are times with copy selection areas greater than a single cube that do not copy what
the yellow highlight is surrounding.
selection area
{F3001}
paste result
{F3003}
what should have been
{F3005}
blocks whose sides match the same plane as a cubes sides are unaffected such as the
triangular sides of a wedge or the right triangle sides on a hepta . Since the hepta shares
a plane on all its right triangle sides it behaves just like a cube for copy selection areas.
https://youtu.be/T_JxSS3JzhA
{F2993}
this doesn't always happen
{F2995}
there's a few trouble spots in this particular example causing the selection box to go in an unexpected direction
{F2997}
to keep it simple the non cube blocks should act like cubes for purposes of determining copy selection area.
if the cursor is pointed through one plane of that cube area and is pointed at the block it should act as though
it were pointed at that side of a cube whose side occupies that same plane
{F2999}
test ship
{F3007}