Michael,

Thanks to Autocad I found a solution!!!

Sat File is not generated at all by Autocad, and if you save MoI sat as dwg - and then import it into Revit - you get the same result as if you would try to import SAT directly generated by MoI - shreres corrupted

Now why it happens and the solution:

Here's an extract from Autodesk white paper:

You can export trimmed NURBS surfaces, regions, and 3D solids to an ACIS file in ASCII (SAT) format. Other objects, such as lines and arcs, are ignored.

ARCS ARE Ignored!!! - (I suppose your .3dm have them!) so if sat exporter will somehow convert surface definition and use (maybe circles or whatever autocad uses for definition - see any sat by acad)? as a definition for spheres - or you change it within you 3dm then everything will work!!!

ps can we arrange something like that?

Thanks
Igor