Model:
- Model properly sized in mm units
- Model has no hidden/frozen elements, no groups/linked objects
- No lights, cameras, helpers, layers, particle view
- All elements has 100/100/100 scale and correct normals
- No modifiers in stack except of turbosmooth
- Elements properly named

Materials and maps:
- No missing textures
- No unnecessary maps in environment / background / unwrap modifier
- Material editor resetted, all paths striped
- Materials and textures properly named

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