"Simon Adameit" <gom### [at] gmxde> schrieb im Newsbeitrag
news:3da1bb9e@news.povray.org...
>
> You dont have to use a hight_field if you want to use an image to deform
the
> surface you can also deform isos with images.
>

Another possibility would be to use select() with some sin()-function, to
get smooth transitions. This might be quite difficult to control and at some
point quite slow though.
If you are willing to make some trial and error, you could use a cylindrical
function (centred on the rock) to control the amount of another function,
say a bump-pattern-function. If speed is an issue, an image-function might
be the fastest solution IMHO.

Marc-Hendrik

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