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Hi,
I recently rendered an old scene of mine in mp6 and noticed that a hf
suddenly acquired lots of holes (well, I assume that they're holes). I
re-rendered the scene in plain 'ol pov and it's fine.
Is this a known problem or should I post more detail (or both)?
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Tom Melly wrote:
>
> Hi,
>
> I recently rendered an old scene of mine in mp6 and noticed that a hf
> suddenly acquired lots of holes (well, I assume that they're holes). I
> re-rendered the scene in plain 'ol pov and it's fine.
>
> Is this a known problem or should I post more detail (or both)?
Is this hf smooth? In this case try to add double_illuminate to height
field, this should fix this problem. I'm not sure, what causes this, but
I guess, that it is due to normal average between vertexes of smooth
height field: normal gets oriented in "opposite direction" to up and
therefore surface is not lighted.
There was discussion about this, see "Heightfield smooth problem" in
this group, started 2000-06-13.
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"Vahur Krouverk" <vah### [at] aetec ee> wrote in message
news:3A1AA326.598CF271@aetec.ee...
>
> Is this hf smooth? In this case try to add double_illuminate to height
Many thanks - that fixed it.
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"Tom Melly" <tom### [at] tomandlu co uk> wrote in message
news:3a1aa636@news.povray.org...
> "Vahur Krouverk" <vah### [at] aetec ee> wrote in message
> news:3A1AA326.598CF271@aetec.ee...
> >
> > Is this hf smooth? In this case try to add double_illuminate to height
>
> Many thanks - that fixed it.
>
... but added another problem (a weird bright line meandering across the
scene) - s'okay, I'll just stick to rendering it in non-mp.
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Tom Melly <tom### [at] tomandlu co uk> wrote:
: Many thanks - that fixed it.
Your "holes" might have been just shadows.
--
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):_;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/
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"Warp" <war### [at] tag povray org> wrote in message
news:3a1bd64a@news.povray.org...
>
> Your "holes" might have been just shadows.
>
Wouldn't shadows turn up in non-mp? Certainly they are in some odd places if
they are shadows.
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"Tom Melly" <tom### [at] tomandlu co uk> wrote in message news:3a1befa2@news.povray.org...
> "Warp" <war### [at] tag povray org> wrote in message
> news:3a1bd64a@news.povray.org...
> >
> > Your "holes" might have been just shadows.
> >
>
> Wouldn't shadows turn up in non-mp? Certainly they are in some odd places if
> they are shadows.
I was thinking the smooth height_field in official POV was doing a double-illuminate
by design already; good or
bad design, take your pick. So in MP you have to state that yourself and that could
explain the appearances.
Bob
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