In addition to the standard attributes and user attributes supported on both polymesh and subdmesh locations, KtoA adds a few additional attributes it can translate.  

polymesh and subdivision

polymesh locations can have subdivision activated (in the ArnoldObjectSettings node) and KtoA will allow them through as subdivision meshes, but with a warning.  It is preferred to use the subdmesh location type.

Additional Attributes

All of the mesh-related attributes from ArnoldObjectSettings (stored in the arnoldStatements attribute group) are applied.  In addition, the following are recognized: