Am 29.08.2012 10:31, schrieb mathieu_r:
> Hi,
>
> Me again..
> Sorry if I post a lot..

That's what the newsgroups are there for :-)

> I wanted to clip a height_field by a box using clipped_by but it doesn't work

Can you be more specific about the "doesn't work" part?

The difference between intersection and clipped_by is that an 
intersection will generate new surfaces where the original object is cut 
apart, while clipped_by will let you look inside the object as if it was 
just a hollow shell.

> However, intersection works. Intersection isn't the best, I think, for that
> purpose?

If it works, it works.

> clipped_by or bounding-by seems more convenient.

Do /not/ use bounded_by for such purposes. It is intended solely as a 
hint for the renderer about how big (and where) a complicated object 
actually is, to speed up finding the object's surface. Any attempt to 
use it for shaping your object /will/ lead to unexpected results.

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