Hi Steve, also one other note:

> Can give me a scenario when you would best use curves/isect

You still do use curves when working with solids as well, like for example in the solids workflow that I showed above there are still curves involved as the first step in creating the base extrusion shape.

The difference though is that you can make stuff happen working more with 2D curves only rather than trying to work with curves that are warping around all over the place in 3D.

Of course, it also all depends on what kind of work you're doing and what particular kinds of models you're creating - if your models are made up of more stylized swoopy surfaces that don't resemble extrusions or revolutions very much then you'll proably be working more with 3D swoopy curves to construct such stuff.

If your models look more like they incorporate some more 2D profile elements in them like they have the base shape of an extrusion, then those are the kinds of things that tend to happen more quickly and easily by working with 2D curves and solids rather than working with 3D swoopy curves.

This is all just kind of general advice though - which particular tools will work best can depend on what particular kind of shape you're trying to build.

The kinds of shapes that are well suited for using 2D curves though tend to be the ones that you can really get built very quickly using more solids + booleans methods though.

- Michael