Wasn't it bob h who wrote:

>Anyway, that isn't the main concern I had.  It's the mosaic produced from
>the hf_gray_16 image when used in a isosurface.  The image being output is
>always nothing but noise instead of smooth pattern (oh yeah, please ignore
>that ppm image unless it means anything.  I just put that in to try it too).
>I thought this was fixed as of beta 8, otherwise I wouldn't have posted
>about it.

What's happening is that .grey isn't the correct way to extract height
information from a hf_gray_16 image, it's the way to extract a gray
equivalent from an RGB image. The data bits are stored in a different
order in a hf_gray_16 than they are in an RGB image, so the resulting
pixels are at all sorts of wrong heights.

So change it from ".gray" to the experimental ".hf", like

        function {y-F_p(x,y,z).hf*.1}

and it may also be worthwhile to increase the max_gradient on your
second isosurface.

-- 
Mike Williams
Gentleman of Leisure

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