Hi Rich, I had the same problem and here is the solution I've found.

In Moi3D best to use OBJ format and set Output: N-gons.

In Cinema:

1. Select maxwell scene object in object manager

2. Selection > Selection filter > Select Tool > Polygon

3. Open Script Manager and execute this script:

CallCommand(1016174); // Remove N-gons
CallCommand(12139); // Points
CallCommand(12112); // Select All
CallCommand(440000042); // Connect
CallCommand(1023133); // #$80Render Render View
CallCommand(12298); // Model
CallCommand(12105); // Undo
CallCommand(12105); // Undo
CallCommand(12105); // Undo

Sorry for my poor English

Regards
L_AN