First I made the rock height field by applying a black to white y gradient
to a rock object similar to those shown in the picture and a camera pointing
in -y direction. Then I made the crack height field in PhotoShop by pianting
a white crack on black background using a smooth brush. Finally I loaded
both heightfields into HFLab (you could use the original Dos utility or the
Windows version built into Leveller), scaled the crack to 0.3 (norm command)
and subtracted it from the rock. The resulting difference heightfield was
smoothed 2 or 3 times. Thats all.

Regards, Christoph

Hugo <hua### [at] post3teledk> schrieb in im Newsbeitrag:
3d3b2fb6@news.povray.org...
> Excellent!! Once in a while, somebody posts a great picture in this group,
> but it's not everyday. Yours are magnificent! How did you make that "hole"
> in the ground, up in front?
>
> Very good ground textures. A pleasing composition of colours and
contrasts.
> The birds add life.
>
> Regards,
> Hugo
>
>

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