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Isosurfaces with pigment functions are a really nice thing to play with.
You can spend hours searching for nice structures in the noise...
But in combination with radiosity it is really slow. I rendered this in
several parts and no more know the exact render time, but it has been
several days in total.
I wonder if adaptive accuracy would be useful for isosurfaces. As visible
in the near foreground the accuracy value is too high here, but the
horizon part would look all right with even higher values and would be
much faster then. Of course I could try to split it up in several
objects, but avoiding the gap between is difficult.
Radiosity quality settings are fairly high (error_bound 0.05) but the
structures in the shadow could still profit from better settings.
Christoph
--
Christoph Hormann <chr### [at] gmx de>
IsoWood include, radiosity tutorial, TransSkin and other
things on: http://www.schunter.etc.tu-bs.de/~chris/
Post a reply to this message
Attachments:
Download 'lscp_erosion1.jpg' (77 KB)
Preview of image 'lscp_erosion1.jpg'
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> Isosurfaces with pigment functions are a really nice thing to play with.
> You can spend hours searching for nice structures in the noise...
Very natural look! I almost feel the erosion. Of course, the scene is
very well composed and lighted, too. A pain the render times...
--
Jaime Vives Piqueres
La Persistencia de la Ignorancia
http://www.ignorancia.org/
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Wow
I must admit I've stopped playing so much as I used to with pigment function
for the very reason you mentioned - speed. Perhaps I should try again.
MIck
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Jaime Vives Piqueres wrote:
>
> Very natural look! I almost feel the erosion. Of course, the scene is
> very well composed and lighted, too. A pain the render times...
>
Thanks very much.
Christoph
--
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other
things on: http://www.schunter.etc.tu-bs.de/~chris/
Post a reply to this message
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Mick Hazelgrove wrote:
>
> Wow
>
Thank you.
> I must admit I've stopped playing so much as I used to with pigment function
> for the very reason you mentioned - speed. Perhaps I should try again.
>
If you do the test render at small size without aa and radiosity it's
possible, although some patience is still required.
Christoph
--
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other
things on: http://www.schunter.etc.tu-bs.de/~chris/
Post a reply to this message
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> I wonder if adaptive accuracy would be useful for isosurfaces. As visible
> in the near foreground the accuracy value is too high here, but the
> horizon part would look all right with even higher values and would be
> much faster then. Of course I could try to split it up in several
> objects, but avoiding the gap between is difficult.
That's an interesting idea... Anyone have any ideas on how to actually do it
or fake it?
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Awesome.
The sky is perfect too.
I only have to complain of the foregroung, which looks like it needs better
precision...
Several days with your Athlon?! You must be a very patient person.
p.s. Just curious: how much slower the first half was compared to the second
one?
--
Jonathan.
"Christoph Hormann" <chr### [at] gmxde> ha scritto nel messaggio
news:3BD52FDF.36E0175B@gmx.de...
>
> Isosurfaces with pigment functions are a really nice thing to play with.
> You can spend hours searching for nice structures in the noise...
>
> But in combination with radiosity it is really slow. I rendered this in
> several parts and no more know the exact render time, but it has been
> several days in total.
>
> I wonder if adaptive accuracy would be useful for isosurfaces. As visible
> in the near foreground the accuracy value is too high here, but the
> horizon part would look all right with even higher values and would be
> much faster then. Of course I could try to split it up in several
> objects, but avoiding the gap between is difficult.
>
> Radiosity quality settings are fairly high (error_bound 0.05) but the
> structures in the shadow could still profit from better settings.
>
> Christoph
>
> --
> Christoph Hormann <chr### [at] gmxde>
> IsoWood include, radiosity tutorial, TransSkin and other
> things on: http://www.schunter.etc.tu-bs.de/~chris/
----------------------------------------------------------------------------
----
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Christoph Hormann wrote:
>
> I wonder if adaptive accuracy would be useful for isosurfaces. As visible
> in the near foreground the accuracy value is too high here, but the
> horizon part would look all right with even higher values and would be
> much faster then. Of course I could try to split it up in several
> objects, but avoiding the gap between is difficult.
>
> Radiosity quality settings are fairly high (error_bound 0.05) but the
> structures in the shadow could still profit from better settings.
The sky seems unnatural to me, and you're right about the error_bound
and need for accuracy in the foreground, but otherwise this is a great pic.
-Xplo
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JRG wrote:
>
> Awesome.
> The sky is perfect too.
Thanks.
> I only have to complain of the foregroung, which looks like it needs better
> precision...
As said, the accuracy value should have been lower, but that would have
been even slower of course.
> Several days with your Athlon?! You must be a very patient person.
>
> p.s. Just curious: how much slower the first half was compared to the second
> one?
I can't say precisely since i did not take that much care, but in general
in such scenes the horizon part is quite slow in comparison to the rest.
Christoph
--
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other
things on: http://www.schunter.etc.tu-bs.de/~chris/
Post a reply to this message
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"Tony[B]" wrote:
>
> That's an interesting idea... Anyone have any ideas on how to actually do it
> or fake it?
Faking? I doubt that's possible.
Implementing it will probably have to wait until the final version of
Povray 3.5. I will surely have a look when the source code is available.
In general i think it's probably not very problematic to vary the accuracy
value.
Christoph
--
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other
things on: http://www.schunter.etc.tu-bs.de/~chris/
Post a reply to this message
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