Fantastic list! Few more: - Ensure you're not using duplicate or extraneous textures, and all textures are assigned to the correct path (aka not your desktop): (Shift+T) - Ensure your skinning has assigned the proper bone affect limit (usually 4 for most games I've worked on, not the default '20' assigned by max). - Ensure…
Turbo Squid has a good checklist for their Checkmate Pro models: Here's the copy and pasted list (got the info from here, http://support.turbosquid.com/entries/20203606?locale=1 : 2. Standards for 3D Model Inspection 2.1 Geometry 2.1.1 No isolated vertices 2.1.2 No coincident vertices 2.1.3 No coincident/coplanar faces…