iClone 7.3 and Character Creator 3 core editing operates on the original mesh structure.  This means that if an object was created with quad faces then they are preserved when imported using OBJ or FBX format via 3DX 7.3 or CC 3.0. 
From now on, content format will be separated into triangulated and quadrangulated faces. 

Tips

• Content prior to iClone 7.3 / CC 3.0 are triangulated.
• Content after iClone 7.3 / CC 3.0 are more likely to be quadrangulated when imported using OBJ or FBX format via 3DXchange 7.3 and Character Creator 3.0. 

How to Differentiate Tri-face and Quad-face Content

Two main features that pertain to quad faced geometries:

• Export File (iContent, FBX, OBJ,....etc)
• Smooth Mesh