"Christoph Hormann" <chr### [at] gmxde> wrote in message
news:3C1### [at] gmxde...
>
> Did i miss something or do you use an image_map in an isosurface function
> without interpolation?  This would lead to infinite gradients and
> therefore serious problems.
>
> Because of this the '.hf' is probably not very useful in most cases since
> it won't work with interpolation.

Went back and checked both with and without interpolate.  Yes, it makes a
big difference.  If not used the isosurface is contoured, and with
interpolate it is contour-free.  I hadn't gotten a sufficient max_gradient
to smooth it without interpolate so now that makes sense.

The previous contouring I was talking about was simply the original
hf_gray_16 output, which turns out to be max_gradient related because of
being a isosurface too.  I was expecting that perhaps max_gradient was being
done differently by default now to where it chose the best automatically.
Maybe my fault for reading between the lines concerning how isosurface
workings had changed.  I was kind of clumping it all together there by using
two isosurfaces in one test  :-)  a regular pigment pattern could have
sufficed.

The major thing is that .hf instead of .gray was the real answer.
--
text{ttf"arial","bob h",.1,0pigment{rgb 9}translate<-1,-.2,3>}

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