obtained while using subtract bool between the main gray solid, and the fucsish solid ;
bools, do seem to randomly either work and not, sometimes a problematic bool, might work by itself, sometimes won’t, other times it will but weirdly, if I do select delete solid after subtracting, it will not and viceversa, or they do work, but they do let an opensurface with two faces missing from the orignal geometry, like this
