Hi Michael,

> This is illustrated and explained in more detail in this FAQ answer:
> http://moi3d.com/wiki/FAQ#Q:_Why_does_show_points_work_for_some_objects_but_not_others.3F

Really i cannot tell you how much i wish to thank you for this clarifying explanations !!

> a solid can only have control points turned on if each surface in the solid are "naturally trimmed",
> which means the trimming boundary corresponds to the boundary of the "underlying surface",
> and each of those underlying surfaces has the same control point structure at their common edges.

So, if i understand correctly, it's like saying that the "solid control points editing" it is only possible
on objects that are made by UNTRIMMED surfaces only.

Is it right ? I hope so.

Nice night,

Marco (mkdm).