Checklist for 3D Modeling

Sunshade type settings for all objects are correct?
For example shadow calculations for the own source of light of the fixture body, clamp and head are excluded?
Names of objects don’t exceed 8 characters (.3ds files)?
Names of object are unique?
Objects exclusively are composed of triangles?
No information has been lost while exporting? To check this, open the exported file with the modeling tool.