PowerBoolTree has a very powerful integrated
automatic filleting option. The two advantages
of automatic filleting are that you don't have to take time to select edges and
the fact that you
get predictable and usually desirable results when modifications are made to the
original
objects.

Original Object with the Big Box as the Tree Root and the Primitives in a Union
Operation

To apply a fillet to an Operation you first select it in the Tree. This is
very important
because nothing will happen if you change values and the Operation is not
selected.
We also need to know which Operation to apply the fillet to. In this case we are going
to choose to fillet the intersection edges with a 0.5
radius. Click on the "Automatic Fillet"
button to activate the Automatic
Filleting dialog (shown below). For Power Solids
customers, there is also a simple way to access
the PowerFillet command. Select
the object in the PowerBoolTree dialog tree view, and then
click on the PowerFillet
button (or menu).

Set Automatic Fillet type to "Fillet Intersection Edges", and Radius
to 0.5.

Here is the Result. Note that only intersection between the big box and
the primitives
have fillets. The intersections between object within the Operation do
not. For example
there is no fillet between the two boxes on top of each other.

Note that modifications to the position and the shape of the primitives and even
the addition
of new primitives produce predictable results and don't require reselection of
the edges
manually. This can save a lot of time and tedium if you are designing a
complex object and
need to make several design changes.
Here is the shaded result of a fillet of the Operation with the Operation Edges
and the Intersection
Edges selected for filleting. Note that you can combine all three of the
selection techniques in
any combination.

Here is the shaded result of fillet applied to the intersection edges and the
operator edges.

Here is the shaded result of all of the edges being filleted.

The cross section type can also be changed. In this image it was changed
to Linear to effect
a chamfering of the objects edges.

Here is the G1 Blended Curve with a 1.5 Blend Scale. Note that the blend
curve options can
produce more aesthetically pleasing results in some cases than can the circular cross
sections.
The G2 Blend Curve will generate an even smooth transition between the surfaces,
and the G3
Blend Curve will be even smoother.

Note how sharply defined the edges in this circular fillet are.

This is a close up view of the G1 Blend Curve Cross Section filleting. Note
how gradual the
transition is between the surfaces surrounding the fillets. For an even
smooth transition between
the surfaces, choose the G2 Blend Curve option.

The Zebra analysis of the Circular Fillet shows the constant curvature of the
fillets.

Here is the Zebra analysis of the G1 Blend curve. See how the stripe size and
spacing changes
gradually.