Hi Kevin,

Have you tried to export your Extruded Object as a CAD model, and use this CAD Object as your detector? If this works, you might be able to play with the Chord Tolerance in its properties under the CAD tab.

See the following excerpt from the Help File:

For most of the objects, the pixel size can be changed in the Object Property > Draw > Drawing Resolution. For a STEP/IGES/SAT CAD file, the pixel size is controlled by the parameter Chord Tolerance in Object Properties > CAD. See 'Chord Tolerance' for more information. For a STL file, the pixels are decided by the triangles defined in the file and cannot be changed.

Let me know if it helps, and take care,

David