File formats
Importing
FCStd. Native FreeCAD file format. Lens supports rendering solids, body colors, linked documents such as linked parts and subassemblies (on the paid tier only), and image planes.
STEP. Lens supports rendering solids, body colors, and the object tree hierarchy.
OBJ and STL. Lens supports rendering meshes only.
Exporting
FCStd. Native FreeCAD file format.
STL. When exporting STL, Lens uses FreeCAD’s defaults.