I have spent HOURS troubleshooting this...
I had to reinstall AC9 on a new machine, and carefully moved everything over. NO problems at all, EXCEPT when I copied a file to create a variation, none of the textures will display. My old files display fine. Anything I create now, even from a brand new emtpy file is textureless. I have no library violations, attribute manager shows the textures for each material correctly.. etc. The other weird thing is when I display in 3D, I get a wireframe first, for a few seconds on the 'new files', and then the 3D displays. Same when I rotate around the building, switches to wireframe to move, then renders 3D when I stop. This doesn't happen on the old files or on the old computer either. It must be a setting somewhere... but damned if I can find it! Excuse my french.
Signed Desparate and D.I.T.W.