Distortions in nXt renderd AutCAD Architecture Curved Walls

[alan]

Please see the attached images.  

In AutoCAD Architecture's native renderer, and in its 3d display, the curved walls appear smooth.  In nXt the materials are uneven (with sometimes extra lines that protrude from the walls).  Distortions also appear in straight walls which should be flat and smooth though the problem is less pronounced.  

I tried changing the material definitions but the problem persists.  

Could this be some sort of scale definition issue?

The problem persists with all the rendering engines (standard path and hybrid).

Any help on this would be much appreciated.

[Roy Hirshkowitz]

This is typically a units problem or a coordinate system problem.  Check the units by typing _DDUNITS at the command line and looking at the insertion units.  If they're correct, make sure the model is not located too far from the origin.  Coordinate systems such as "state plane" will not work correctly with nXt-- the model will have to be moved closer to the origin.

[alan]

Yes, Roy, the units were correctly set but the model was very far from the origin (forgot about that issue).  Looks fine now.  Thanks very much for your prompt reply.