Whether that's preferable over just stronger shrinkage is debatable and depends on the application. Because of this switching of methods near the boundary adaptive subdivision with boundaries which uses the Bi-Quartic scheme can have slight unevenness near the boundary. The code contains material contributed by Denis Zorin and Wim Sweldens. It has also benefitted greatly from discussions with Nathan Litke, Igor Guskov, and Andrei Khodakovsky. The package uses qvlib written by Paul S. Strauss of Silicon Graphics and modified by Henning Biermann to support more vrml nodes and fileio.
All files come in a single compressed tar archive .