[in, out] FaceFillTypeCode – An enum that determines the fill type for the sides of the building. Value is -1 if not all sides are set to the same fill type. The following are its enumerations:
FACE_UNDEFINED = -1
Returns when all walls do not use the same fill type.
FACE_COLOR = 0
FACE_TEXTURE = 1
FACE_TERRAIN_TEXTURE = 2