When you are making your first selection for Section 1, pick at the end point of the curve. UG will automatically use the point for Section 1 and your next prompt will be for Section 2 curves.
I screwed up with my first response. I meant Snap Toolbar, but typed Selection Intent. I don't use Thru Curve Mesh anymore since getting Shape Studio, so it's been a while since I've used it.
I'd highly recommend it if you're doing a lot of Freeform modeling or working with Class A surfaces of any sort. It's not a miracle worker, but I feel the interfaces are easier to work with & learn. I hardly use any Freeform Features since getting Shape Studio.
The analysis tools kick ass, but some of the surface editing dialogs are buggy at times.
I believe the cost is somewhere around $7,000, but that was a few years ago when we first got it. The module is pretty powerful & offers a few more commands that can make surface modeling & imported surface repair much easier. Styled Blend is really powerful, but it is a Face Blend & must Trim & Attach to solids, so it can fail on you quite a bit.
This module is still relatively new & tends to evolve with each release of UG. Some of the capabilities include:
-Swoop: click, drag & finally shape a surface
-4 Sided Surface: rubberband a 4 sided surface
-Studio Surface: 5 different types of surface creation based on section & guide strings (1x1, 1x2, 2x0, 2x2, NxN). Allows continuity assignment up to G2 (curvature) continuity. Editing of these features can be buggy at times.
-Styled Blend: allows user to create a face blend up to G3 (acceleration) continuity. Real time updating allows user to watch blend change shape before applying to model.
-Styled Corner: allows user to create a "a smooth, ball-shaped transition surface that is defined by the shapes of incoming, intersecting curves." "Use Styled Corner to rapidly develop accurate, aesthetically pleasing, Class A quality corners at the projected intersection of three incoming curved surfaces."
-Styled Sweep: "Use Styled Sweep to rapidly develop accurate, smooth, Class A quality freeform surfaces from a set of curves. Dynamic editing tools let you explore immediate design changes so you can visualize the aesthetic or practical implications of a generated surface. A Styled Sweep is defined by one or two sections moving along a specified guide string. A touch curve or spine curve may be used to define the surface orientation."
-Deform Sheet: bend, twist, skew sheets into a desired shape. Does not have continuity control or edge matching capabilities. Unparameterizes any associative sheets.
-Transform Sheet: move, rotate, scale a sheet body. Unparameterizes any associative sheets.
-X-Form: Pull, tug, drag surface poles to 'sculpt' a surface into a desired shape. Very powerful.
-Match Edge: allows user to match edge to another surface & apply up to G3 continuity to the matching surface.
-Snip Surface: a form of trimming that is permanent. Easier than Trim Surface because boundaries to do not have to be right on or insecting the target surface. Remove Trim does not untrim a snipped surface back to its original size.
-Refit Face & Pole Smoothing: individual surface repair methods. Change degree, etc.
-Curve on Surface: creates an associative curve that lies on a target surface. Quite nice & can replace curve projection to an extent.
-Shape by template: allows user to specify a 'template' to shape other splines & maybe even surfaces (can't recall).
Those are a few of the surfacing commands available. You also get additional analysis & visualization tools that should be listed in the UG documentation.
