  This paper presents a hybrid algorithm that combines features form both
Sqrt(3) and Loop Subdivision schemes. The algorithm aims at preserving sharp
features and trim regions, during the surfaces subdivision, using a set of
rules. The implementation is nontrivial due to the computational, topological,
and smoothness constraints, which should be satisfied by the underlying
surface. The fundamental innovation, in this research work, is the ability to
preserve sharp features anywhere on a surface. In addition, the resulting
representation remains within the multiresolution subdivision framework.
Preserving the original representation has a core advantage that all the
applicable operations to the multiresolution subdivision surfaces can
subsequently be applied to the edited model. Experimental results, including
surfaces coarsening and smoothing, were performed using the proposed algorithm
for validation purposes, and the results revealed that the proposed algorithm
outperforms the other recent state of the art algorithms.
