If you are having problems displaying an exported model in an external viewer, it might be due to a different scale, translation or the viewer not supporting georeferenced or double precision data as input.
To solve this, you can reset the translation and scale of the model in Zephyr to a zero-centered local reference system before exporting. To do this, use the "Reset to local rendering" button in the toolbar (see the attached button).
Or alternatively, you check the "local rendering reference system" checkbox during export.