COLLADA 1.4 Import

Cinema 4D supports the following elements for import:

Materials (see "Export" for details)
Layer names and layer assignment
Hierarchies
All types of geometry (polylist, polygons, triangles, tristrips, lines, linestrips (the last two as Splines)), incl. N-Gons, Normals and UV coordinates.
Instances
Splines
Lights
Cameras
Joints (with links/skinning)
Animations (Position, Scale, Rotation)