- [Instructor] In Generative Shape Design,
we have a tool called Multi Section Surface.
This allows us to create a surface
between multiple sections, section one, tangency,
section two, tangency, and let's Preview that.
This is similar to the Blend surfaces,
but because it's a Multi Section Surface
it also allows us to add guides.
So this is a mesh surface.
It's allowing us to pick a mesh of curves
to define the shape that we want.
Now, when I want to select the guides,
I can come down to the Guides window
and select the three dots,
and pick guide curve one and guide curve two.
If I have adjacent surfaces for tangencies,
I can pick those as well.
I select OK and the surface is created.
This is very useful if I need to be able
to control the shape of that surface at an end
using one of the boundary curves.
So here I can say I want this to be Curvature.
Do the same thing here.
And you'll notice the surface updates
right along with that curve.
I can increase the Tensions as well.
So if I have additional splines, maybe 3D curves,
GSD splines, whatever they may be, or adjacent surfaces,
I can pick those edges
and control that shape using that mesh.
I could also have curves on the interior of the surface
in both the section and the guide directions.
To be quite frank, you could pick
dozens and dozens of curves in the section
and in the guide directions as well,
but I don't recommend you going too high on the section
or the guide-curve count.
In this case, less is more.
Oftentimes, it's better to pick
just the four bounding objects
and allow the system to do what it's going to do
to create that shape or the transition.
It does a fantastic job at allowing you to create
very smooth surfaces by allowing the system
to help define what the transitions are doing.