Problem: while importing relatively simple structures, carbon centers appear as two-dimensional ligand fields (with bizarre shapes) instead of sp3-type tetrahedral atoms. I use a Mac, not a PC. This is a time-consuming pain to correct. I’m an organic chemist, not a computational one.
Can you be a bit more clear on what you’re doing? It would help if you could provide an example file or at least a screenshot.
Are you reading in 2D depictions (eg ChemDraw) and hoping for accurate 3D geometries?
Just trying to understand what’s happening for you.