Hello. I try to use a ground fog that is upside an HeighField (with "hollow"
keyword) this HF is located at 0.0 on Z axix, up to 1.0. I put a ground fog
from 0.0 to 'alt' 3.0 and I try with differents distances. But pov said that

this HF with a plane... It's work ! Is there a bug ?
Thanks...

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PS : The 'inverse' keyword doesn't work too !

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news:3fae8803@news.povray.org...
> the fog doesn't work ! If I replace
> this HF with a plane... It's work ! Is there a bug ?

Well, hf have been used with ground fog for a while, so if there's a problem
here it must be rare indeed. To debug this, you need to make a minimal scene
demonstrating the problem (only camera + light + fog + hf). My first guess
is that something else in the scene, or something specific to this
particular hf, is causing the problem, but it's impossible to say without a
minimal demo scene.

G.


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Sorry... I've found the solution : There where a (old test) plane 30 units
lower than HF, but he was hollow too, I removed it and its works BUT I don't
know why a infinite Y plane 30 units under the HF removes my fog !!!

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> I don't
> know why a infinite Y plane 30 units under the HF removes my fog !!!

A plane's "inside" is not necessarily underneath it. If you defined your
plane like this:

plane {
-y, 30
}

then it will be solid everywhere *above* y = -30. Instead, you can define it
like this:

plane {
y, -30
}

and it will be solid *below* y = -30.

 - Slime
 [ http://www.slimeland.com/ ]

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