Does anybody here know the what's happening here?

 From:  keith1961
7961.1 
I have been having a very frustrating day. I made a Jeep that renders perfectly in Simlab Composer:





This is my 7 year old daughters colour scheme!

But when I import in into 3D Coat some of the normals are inverted. I have tried splitting it apart and joining it together (many times) The piece concerned forms a solid (although some other objects intersect with it. (Didn't think of merging them until just now so might also try that too). I took it into Blender and the normals are reversed and the command to make them consistent has no effect. I have tried fiddling with the import options in 3D Coat but nothing worked. I notice from various threads that some people are using Moi and 3D coat together and I have not had this problem using this combination before.

Two pictures below first without backface culling ticked and the second with.












Maybe its something I need to post to the 3D Coat forum?
Thanks
Keith