XROK1, Maybe that´s not such a bad idea. My apologies for asking silly questions, but I am not familiar with MODO or any of these high end polygon/SDS modeling applications.

However I have specific topological requirements. I want to convert meshes based on triangles into Catmull-Clark subdivision surfaces having a rectangular controlpoint grid. Is modo capable of translating meshes consisting of triangles into SDS divided by a recangular control point grid? Direct translation of NURBS into rectangular SDS topology l is easy, but when the NURBS has been trimmed things become complicated.