#9 Interactive subdivision surfaces

[Joern P. Meier]

Please make the subdivision surfaces ("smooth" mesh)
interactive, i.e. the control mesh remains after selecting the
"smooth" operation, and modifications to the control mesh are
thereafter applied in realtime to the subdivision mesh (probably
with variable smooth level). You might also consider a selectable
"crease factor" for edges, to make the process of creating
creases in smooth meshes easier.

This would be quite cool and professional, too. :)