"Warp" <war### [at] tagpovrayorg> wrote in message
news:3ed7f561@news.povray.org...
> Hughes, B. <omn### [at] charternet> wrote:
> > Well, CSG difference from a box could be the answer.
>
>   Perhaps you mean the intersection of the heightfield and a box { 0,1 }?

No, I meant difference alright, I just spoke too soon. That would require a
box having an inverse keyword added to it. CSG intersection doesn't always
seem to do what I think it's going to do so I just acquired a habit of
avoiding it if I think there might be confusion. My mistake to suggest CSG
difference.

Glad scaling was also told of concerning this, as I read elsewhere, I had
neglected to mention it. Although, I am not sure anyone said scaling of a
box {0,1} will leave three sides unaffected due to the <0,0,0> corner.
Bottom, left and front, as viewed with a typical camera. The height_field
and box should be centered on <0,0,0> to make that easier preventing the
coincident surfaces.

Bob H.

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