To fine tune
3D smoothing parameters of an object, select the value *Custom* in
the Smoothing property of the
object. There appears the
dialog box shown in Figure 1.

*Figure
1: Smoothing parameters.*

The smoothing process is similar to sand downing an
object. The field *Smoothing Factor* determines the kind of
sandpaper, while the field *Number of Iterations* determines the
time expended sand downing the object. The larger the *Smoothing
Factor*, the smoother the object and also, of course, the larger the *Number
of Iterations*, the smoother the object. In general, as in the
analogy with sand downing, using a small value for *Smoothing Factor*
and, eventually, a high value for the *Number of Iterations* may
yield better results than using a large value for *Smoothing Factor*.
On the other hand, using a large *Number of Iterations *may take
long computation time when generating 3D reconstructions.