Hi Yannada,

T-Splines is forward and backwards compatible with NURBS. That is you can convert NURBS to T-Splines AND vice versa. Basically T-Splines is a specific expression of Catmull-Clark subdivision surfaces but what makes it so beautiful is that it is also a superset of NURBS, thus it bridges these 2 variations of expressing or modeling surfaces.

Modeling with T-splines is basically like modeling with any other variation of CC subdivision surfaces. The advantage of T-Splines is that you can model something with NURBS, then convert the NURBS into T-Splines and continue to refine the shape working in the same way as you were modeling in any standard SDS modeler. Of course the workflow can be reversed in the different direction.....starting modeling something using subdivision surfaces modeling style, then convert the model to NURBS and continue working NURBS style using Booleans, lofting, sweeping and trimming.

So to summarize T-Splines is a pretty cool thing, but unfortunatly it is currently only available as a plugin for Rhino. For those of us who prefer MoI we just have to wait for a while until a plugin for our favorite application becomes available.

.....P.s. one more thing, I just received a copy of an article on extended subdivision surfaces (ESUBS) today, which is some variation of bridging NURBS and Catmull Clark SDS, similar to T-Splines, but haven´t had time to read the paper yet.

But maybe (if we are lucky) we will have an ESUBS plugin for MOI in the future ;-)