— Model —
Model have no hidden / frozen elements no groups / linked objects
There is no lights cameras helpers layers particle view
All elements have 100/100/100 scale and right normals
Elements properly named

— Materials and maps —
There is no maps in environment / background / unwrap modifier
Material editor resetted all paths striped
No missing textures
No multimaterial used (For correct FBX export)
Materials and textures properly named

— General —
No 3rd-party plugin used
No ALC and CRP viruses
Track View Controllers deleted