Hi Petr,

> So parent object style in this case is only somewhat
> like "implicit flag" which say "apply this style in a
> particular cases of my subsequent modification".

Yup, that sounds like a good description.

Kind of like the "default style for this object" to be used in ambiguous cases in further edits.

It's the style that is assigned to the parent brep object which is kind of like the container object for all the faces and edges of a solid.


So in addition to the other ways for how it gets set that I mentioned before (like first selected object in a boolean or holding shift when clicking a style swatch), if you just simply select a solid with 1 click so it has "whole object" selection, when you then set a style at that point it will set the style on the parent object and all sub-objects all together to the same style. So most of the time that will probably be the way that it gets set initially.

- Michael