Inverted faces on 3D objects?

[Anonymous]

I run AutoCAD 2018 with MagiCAD 2018 add-on, and I've noticed that some of the models (ducts) have their faces inverted in the 3D viewport (see attached image). This only applies to some of the model drawings but not all. I've tried every display/layer setting I could find related to transparency, but the display issue persists. It seems to have nothing to do with neither visual style nor layer transparency.

I suspect the problem might be a software bug rather than a visual setting, but I dont' know how to fix it.

Any ideas?

[Anonymous]

I found that placing 3D objects too far from origo causes this issue. I've countinued my thread here:

https://forums.autodesk.com/t5/autocad-forum/inverted-faces-on-3d-objects-when-placed-too-far-from-o...