What’s not supported by COLLADA

The following is a list of elements that DAE (COLLADA) do not support on export or import.

Triangles, polylist, and polygons. The FBX Converter exports polygons without holes, and imports them without holes and triangles.
Bake & single matrices
Variable sampling rates.
Absolute Paths (when invalid)
Instances
Skew
Non-standard Materials and maps for different parameters
Orthographic cameras
Normals (for skin and shape)
Light parameters
Vertex animation
Material parameters animations
Effects specialized profiles
COLLADA physics

NoteExport or import to DAE (COLLADA) can destroy or produce unpredictable results for some elements.