Too bad you hadn't tried the iso surface function in Super Patch instead. I haven't
used
it myself but it would have probably been a good replacement.
I'm not in-the-know about HFs at all but from what I can make out about them they are
peculiar it seems. I was guessing all wrong when I said before that maybe they have
peaks and valleys at the white and black pixels (centrally that is), of course they
don't really I suppose, otherwise any single white pixel from the image used would
create a high point within itself. This does not seem to be the case. In fact, I
cannot
really discern what is going on. The test HF I tried out showed several confusing
"faces" to the thing. From one vantage there appeared to be 3 stepped levels of white
and black, and another suggests a double triangle for each pixel. I expected to get
either of two things, a spike and anti spike or a square high plateau and low one.
Even though I'm still not certain I'm now guessing it's a pair of triangles to divide
each pixel, which is strange because how does it get its orientation? Unless its
actually 4 triangles for each, and in that case there should be a central peak (or
vertex at least).


Lummox JR wrote:
> 
> No other type of object I know of will produce the dune effect I want,
> or else I'd try it; I may be an algebraphile, but I shudder at the
> thought of producing a 7th-order polynomial to fit the bill. Plus, I've
> already positioned the other objects within the scene--replacing the
> height field at this late date would bring on problems innumerable.
> 
> Lummox JR

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