why did you 3d print an axis debug cube that large? fighting with bed leveling issues?
also very curious slicer artefacting going on with the x on the face
I have some green PLA that breaks whenever stop printing. I think it is brittle as it cools. So doing big prints to get rid of it.
The pattern is actually the slic3r hex mode pattern.
the exposed face is the bottom of the print, I think