Hi Danny,

> How about automatically replacing the surface if planar?

That could be possible but it has some side effects like for example right now if you extrude a curve such that it generates the type of vertical surface you have there, if you want to edit the control points of it, it might be weird if you got a larger 4 point plane as the surface to edit rather than one with the control points of your original curve.

One of the ways that Extrude works currently is that the surface you get inherits the same control point structure as your generating curve, if these kinds of surfaces were replaced by 4 corner point planes that would not be the case anymore...

- Michael

Hi Michael,

I see. You're thinking for all scenarios where someone might want to edit the control points, I understand, I'm looking at it as in the Engineering point of view where control points in a model are never moved.

Thanks anyway, I can always go the extra step and delete those surfaces and use Construct > Planar to make nice single surfaces.

Cheers

Hi Danny, well in addition to moving control points there are some functions like Flow where the particular control point structure of the surface has an impact... So replacing surfaces in extrude could then have a side effect of some unwanted changes in behavior when then using flow on that surface afterwards.

I actually do have a similar type of surface replacement mechanism in Revolve currently, where if you have a line perpendicular to the revolve axis it gets replaced by a trimmed plane just like that, and it has indeed gotten a couple of people confused when using Flow with those particular surfaces...

On the plus side a simple plane surface does tend to work better for intersections calculations.

- Michael