Nico wrote:
> 
> Yes, earth with moon in orbit would be great but having read the webpage 
> describing the method, I'm not sure I know how to do that (or did I miss 
> the link ?). Could you post an example ?

You don't really need the techniques described on my site since a fairly 
low resoluton should be sufficient.  Just an isosurface with image 
mapped texture.  I will see if i can put together a simple version.

Christoph

-- 
POV-Ray tutorials, include files, Sim-POV,
HCR-Edit and more: http://www.tu-bs.de/~y0013390/
Last updated 2 Sep. 2003 _____./\/^>_*_<^\/\.______

Post a reply to this message

in news:3f8d6461@news.povray.org Nico wrote:

> ... some more balls ...

here's blobbed isosurface one that's been sitting on my disk for almost a 
year now and I have no idea what to do with it. So if you can use it, ill 
post the code.

Ingo

Post a reply to this message

Attachments:
Download 'cage.jpg' (21 KB)

Preview of image 'cage.jpg'

> Concerning radiosity settings, they're more or less "random" since I do
> not really understand them and get them from some file I have, so I'm
> open to any sugestions (and already raised the nearest_count).

I'm not an expert, but there should be faster settings which might suffice.
Regarding the distributed rendering: we should wait and see how the final
image is composed. Maybe it is possible, maybe it isn't. In any case, there
should be means of using load/save radiosity for individual sections. I'll
experiment with that.

> Thanks for all your help and advices.

No problem. Another thing I noticed: due to lighting angle, the current
objects don't really require photons. There is a caustics-effect with the
water-sphere, and some minor lighting effects with the reflection of the
blurred sphere, but they aren't that obvious. Unless some object really
calls for attention when not using photons, you might want to leave them
out.

-- 
Tim Nikias v2.0
Homepage: http://www.digitaltwilight.de/no_lights
Email: tim.nikias (@) gmx.de


>
> The golf ball is posted in the new corrected version 2.
> You're absolutely right about the two pass rendering, especially when
> there is transparency and reflection (they can be shut down during the
> first pass, right ?).
> Concerning divided rendering, I don't see what could be interaction
> between boxes since objects are fully within a box. If I tell povray to
> render only top-left box (by specifying what image part to render), will
> that be wrong in term of radiosity interaction ?
>
> Concerning radiosity settings, they're more or less "random" since I do
> not really understand them and get them from some file I have, so I'm
> open to any sugestions (and already raised the nearest_count).
>
>
>  > PS: You might have noticed that I'm pretty enthused with this
> image... :-)
>
> I sort of noticed :)
> Thanks for all your help and advices.
>
>
> Nico
>
> Tim Nikias v2.0 wrote:
> > You're using radiosity. Unless someone prerenders the scene and saves
the
> > radiosity data, which the others can load, there is light interaction
> > between subparts. For a final render I'd suggest the two-pass radiosity
> > method the newsgroups cooked up at some point anyway, so divided
rendering
> > should be possible then. You can find more information on that two-pass
> > method on my website, within my Past-Projects-Section, entitled "Indoor
> > Radiosity Experiments". I've made use of that technique for my Gerberas
> > Image as well, so you'll find information on that in there as well.
> >
> > I've also noticed that your radiosity settings are somewhat queer, e.g.
> > nearest_count set to 1. Why is that? I raised nearest_count to 8, cause
> > otherwise it gave me ugly artifact with photons. Once the image is
ready,
> > I'll post it.
> >
> > Care to post the Golf-Ball? Maybe I could have do some experiments with
it.
> >
> > Regards,
> > Tim
> >
>


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.525 / Virus Database: 322 - Release Date: 09.10.2003

Post a reply to this message

No Radiosity used for this render.

I'd say, maybe radiosity could be dropped, instead use the threeway-lighting
model and no ambient light. Distributed rendering should be no problem then.

I've also noticed that the golf-balls look a little too small at this size,
and they're not white enough. Maybe a few less, bigger and then place them
in the cube.

Regards,
Tim

-- 
Tim Nikias v2.0
Homepage: http://www.digitaltwilight.de/no_lights
Email: tim.nikias (@) gmx.de


>
> Hi All,
>
> Since I'm always searching povray newsgroup to look for specific methods
> of doing things, I decided to try to gather them all in a single picture
> both to have a quick idea on what it looks like and also to have a quick
> access on source. The image currently shows (in order):
>
>   - Blurred reflection (from Povray Questions and Tips)
>   - Spheric mapping of object (I did this one)
>   - Ice (or water ?) from a recent post by IkA
>   - Furtex by Rune S. Johansen
>
> Of course, this image is still a WIP and it misses a bunch of other
> great methods/tips that have been posted like subsurface scattering,
> fire, water, furballs, media clouds, etc.
>
> At this point, I would need your help to complete the image by adding
> some more balls showing special effects/textures/methods...
>
> Anyone interested ?
> Comments ? Ideas ?
>
>
> Nicolas
>


----------------------------------------------------------------------------
----





---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.525 / Virus Database: 322 - Release Date: 09.10.2003

Post a reply to this message

Attachments:
Download 'balls.jpg' (76 KB)

Preview of image 'balls.jpg'

Oh, I've forgotten to announce one change I made: the roughness of the
water-sphere was adjusted to .001, otherwise the highlight isn't really
visible.

-- 
Tim Nikias v2.0
Homepage: http://www.digitaltwilight.de/no_lights
Email: tim.nikias (@) gmx.de



---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.525 / Virus Database: 322 - Release Date: 09.10.2003

Post a reply to this message

I can use it for sure, thanks.
How long does it take to render ?

Nico

ingo wrote:
> in news:3f8d6461@news.povray.org Nico wrote:
> 
> 
>>... some more balls ...
> 
> 
> here's blobbed isosurface one that's been sitting on my disk for almost a 
> year now and I have no idea what to do with it. So if you can use it, ill 
> post the code.
> 
> Ingo
> 
> 
>

Post a reply to this message

I tried a render with radiosity for the golf balls and it looks nice 
IMHO (see image) but render stops before the end (0pps, maybe some bug).
I also tried the two pass rendering trick and it really speeds things 
up. I did the dummy render at 300x300, no reflection, no transparency, 
no aa and the final at 600x600 (still running). So far the water ball 
seems really different from yours so I guess I have to not remove 
transparency during the dummy render.

Nico

Tim Nikias v2.0 wrote:
> No Radiosity used for this render.
> 
> I'd say, maybe radiosity could be dropped, instead use the threeway-lighting
> model and no ambient light. Distributed rendering should be no problem then.
> 
> I've also noticed that the golf-balls look a little too small at this size,
> and they're not white enough. Maybe a few less, bigger and then place them
> in the cube.
> 
> Regards,
> Tim
> 
>

Post a reply to this message

Attachments:
Download 'balls.jpg' (7 KB)

Preview of image 'balls.jpg'

in news:3F9### [at] loriafr Nico wrote:

> 
> I can use it for sure, thanks.
> How long does it take to render ?

with +h400 +w400 +a0.1 it takes an hour and 20 minutes on an athlon 1800+

source is at:

Newsgroups: povray.binaries.scene-files
Subject: blobbed iso for ball collection
From: ingo <ing### [at] tagpovrayorg>
Message-ID: <Xns### [at] netplexaussieorg>
Date: 17 Oct 2003 14:00:36 -0400

Ingo

Post a reply to this message

Nice, I love spheres, and these are nice specimens indeed.

I don't know if they can be considered as "showing special 
effects/textures/methods", probably not, but I thought I'd mention them 

include..." which he posted here in p.b.i.

Post a reply to this message

Hm. It seems that the additional light from the skysphere has a great impact
on the lighting. I'll see if I can adjust the threeway-lighting model to get
a similiar effect on the golf-balls. Maybe that'll be faster than radiosity.

And you shouldn't switch transparency off, as radiosity won't be calculated
behind transparent objects then, which is probably why the watersphere looks
different.


-- 
Tim Nikias v2.0
Homepage: http://www.digitaltwilight.de/no_lights
Email: tim.nikias (@) gmx.de


>
> I tried a render with radiosity for the golf balls and it looks nice
> IMHO (see image) but render stops before the end (0pps, maybe some bug).
> I also tried the two pass rendering trick and it really speeds things
> up. I did the dummy render at 300x300, no reflection, no transparency,
> no aa and the final at 600x600 (still running). So far the water ball
> seems really different from yours so I guess I have to not remove
> transparency during the dummy render.
>
> Nico
>
> Tim Nikias v2.0 wrote:
> > No Radiosity used for this render.
> >
> > I'd say, maybe radiosity could be dropped, instead use the
threeway-lighting
> > model and no ambient light. Distributed rendering should be no problem
then.
> >
> > I've also noticed that the golf-balls look a little too small at this
size,
> > and they're not white enough. Maybe a few less, bigger and then place
them
> > in the cube.
> >
> > Regards,
> > Tim
> >
> >
>
>


----------------------------------------------------------------------------
----





---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.525 / Virus Database: 322 - Release Date: 09.10.2003

Post a reply to this message