This function must not be used after a visibility map was loaded into the base object (the one pointed to by carver).

The object pointed to by aux must have the same original size as the base object. Note that the original size information is reset whenever a flattening operation occurs, or the rescaling direction changes, so that this function should be called befor rescaling occurs.

There is no limitation on the number of LqrCarver objects which is possible to attach. Nesting is also possible. It is irrelevant if the aux carver is initialised or not; from the moment of attachment, it will passively undergo all transformations performed over carver.