I think I may have found the source of the display issue. The static models I am using are taken from a dataset that was created from aerial imagery and scanning. The model creation process was undertaken via a survey contractor using an automated process. The building models, whilst fulfilling their purpose are quite rough and do not adhere to any proper content creation standards - therefore there are allot of duplicate edges, overlapping faces, etc.
In the previous verison of CE importing these objects was not an issue. Under the 2011 upgrade there must have been changes / optimisations made to the geometry import engine. I have noticed that I have been getting errors in the 'Problems' window ( not in the log ) saying something like:
'SprH0250.obj' contains: 0-area faces (removed) and/or faces referencing a vertex more than once (split): 265 => 264 faces; 12 0-length edges; 1 unreferenced vertices (removed them); CBD_Export_2011.cej /VB_Export/scenes Hole - 42dfc373-1e5c-11b2-b94c-001f2904abb3 Model Error
For the sake of trial and error I took one of the building models into MAX and went through and optimised the model ( welded all verts to 0.1m, removed isolated verts, smoothed normals, etc). This optimised model imports into CE 2011 with no issues.
With approx 98,000 individual building models in our dataset - short of writing up a MAX-Script to batch process all of these models - Is there a way to revert the CE import plugin so that I can import these unoptimised models without these issues ( pretty much use the 2010.3 importer ) ?
Any ideas on any good mesh optimisation tools I could use? Mesh-lab, etc? Am not looking forward to writing a custom MAX-Script is all.