Rescale operations involving both directions will dump two maps.

The dumped maps will be attached to the LqrCarver object and can be accessed at any later time using the functions lqr_vmap_list_foreach(3) or a combination of lqr_vmap_list_start(3), lqr_vmap_list_current(3) and lqr_vmap_list_next(3).

Using this setting is pointless if the LqrCarver object is not initialised.

The function lqr_carver_set_no_dump_vmaps reverts the effect of the previous one (but the maps dumped so far will be kept).

Note that it is also possible to dump the visibility maps manually; however, using the automatic dump is the only way to get intermidiate maps when the function lqr_carver_resize(3) performs the rescaling in both directions, or in more than one step.