In FBX SDK, a mesh can
have multiple layers. A layer (class KFbxLayer) is a container for a layer
element (class KFbxLayerElement)
that will affect how the mesh will be rendered.
NoteUnless you need more
than one layer (for some advanced purpose), always use layer 0 and
only layer 0. MotionBuilder, FBX for QuickTime, and the FBX plug-ins
for 3ds Max and Maya only process normals and materials stored in
layer 0.
