Wasn't it Christoph Hormann who wrote:
>
>
>JRG wrote:
>> 
>> It doesn't look like a landscape at all now, no matter whether you're using
>> iso of hf.
>> The hf version seems to be flipped along the y.
>> 
>
>I can confirm there is something strongly going wrong, since the scene
>file has not changed there must be some difference in POVRay that causes
>this.

It looks like the detailed structure of the agate pattern has changed,
and viewpoint 1 has ended up being below ground level. This has
different effects on the iso than the hf because the iso is closed (so
what you see is an extreme close-up of the vertical wall) and the hf is
open (so you see the ground surface from underneath).

An increase in the z co-ordinate of the camera makes it look like a
landscape again. E.g.

#if (Viewpoint=1)
  camera {
    location    <3.7, -0.55, 1.3>

-- 
Mike Williams
Gentleman of Leisure

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