In article <jp33lu4h4sf8knpgf3l3ltugem5shjpp0i@4ax.com>,
 Peter Popov <pet### [at] vipbg> wrote:

> I know it _should_ and it works in some cases, but it doesn't always
> work. The old trick used was to clip the HF with an open cylinder and
> union it with the cylinder clipped by the HF. However, there's no open
> box except for an open prism, and that produced artifacts that sturm
> didn't fix. It didn't work with clipping or intersecting it with a
> regular box either, nor with a semi-open box clipped by a plane.
> 
> Do you really think I am _that_ new to POV? :)
> 
> It just occurred to me I didn't try intersecting it with a mesh box.
> Back to the drawing table.

I said a box and I meant the built-in "box" primitive.

I just tried it and it works fine. Under what conditions doesn't it 
work? Are you making sure the box sides are "inside" the height field? 
The artifacts you describe sound like coincident surface problem, or the 
box surface being coincident with the height field in/out boundary. 
Either use a slightly smaller box or slightly larger height field.

I really wish you could just put "open false" in the height field 
block...maybe I'll code that up as a patch someday. It should really 
default to on, but having it off by default would preserve backwards 
compatibility.

-- 
Christopher James Huff <chr### [at] maccom>
POV-Ray TAG e-mail: chr### [at] tagpovrayorg
TAG web site: http://tag.povray.org/

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