For real time or games not necessary more subdivs low poly as it can be .
*Material are included *Renderer Vray in 3dmax *Real modelled by world size *Same models are unwrapped the others just uvw mapped. *X,Y,Z 0,0, *Units use CM *No cleaning up necessaryjust drop your models into the scene and start rendering. *No special plugin needed to open scene. *No part-name confusion when importing several models into a scene.