UPDATE on SturmPanzer IV Brummbär (mid) "not selectable by clicking in the 3D model"...guess related, if you you move away from it, at certain distance, more or less the same distance where some other models loose the shadow and become bright (or the other way around depending where the sun is), the Brummbär (mid) 3D model vanished, leaving just the commander floating in the air...