I create 3 nurbsCircles and position and shape them.
Another view from perspective
I now loft 2 sets of 2 curves starting from the left most curve to create a 2 1-span nurbsSurfaces.
Now I do an attachSurface with the blend option. Once blended, I turn on "Blend knot insertion" and set the parameter value at 0.25.
Now I want more spans going around the surface. So I use rebuildSurface for only the U direction. And I set the spans to 18. The bottom surface is the result. Not what I want. Notice how the surface has changed in the V direction as well. The middle surface is the original. And the top surface is what I want. Notice how the V direction hasn't changed. But I had to do this manually by first rebuilding my loft curves to 18 spans. And then repeating the loft operations and then the attachSurface operation.
Why can't Maya respect the U only direction for the rebuild surface function? This happens in the V as well. Basically, rebuildSurface is not doing the right job. This is a bug but the Bug Report site is not displaying correctly so can't report this.
