Hi,
I've been trying to get a good sand cloud effect,
and settled on type 5 scattering as my best bet.
These two animations show a blob with media and
type 5 scattering with the eccentricity value
varying from -1 to 1. The bar at the left of each
indicates the curent value, positive is up.
One image is lit from the front, the other from
the back.
They're a bit on the large side to post, so I've
linked them.

http://thyme.homelinux.net/front-lit.gif
http://thyme.homelinux.net/back-lit.gif

relevant settings:
emission rgb<0.5, 0.4, 0.1>*0.5
absorption rgb<0.5, 0.6, 0.9>*2
scattering { 5, rgb<0.5, 0.4, 0.1>*2.5 eccentricity Eccentricity }
density { colour rgb<1, 1, 1>*2 }

PS
Wouldn't it be nice to have a newsgroup dedicated
to these sorts of test renderings? Something like
povray.samples or somesuch? I know I'm not the only
one to occasionally post stuff like this :-)

-- 
Bill Hails

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"Bill Hails" <bil### [at] europeyahoo-inccom> wrote in message
news:3eff65dc@news.povray.org...
> They're a bit on the large side to post, so I've
> linked them.

That's because they're gifs. You should post an mpeg version (I can't be
bothered to wait for the gif to download, it's taking ages!).

> PS
> Wouldn't it be nice to have a newsgroup dedicated
> to these sorts of test renderings? Something like
> povray.samples or somesuch? I know I'm not the only
> one to occasionally post stuff like this :-)

I thought this newsgroup is dedicated to test renderings, people almost
never post finished work here.

--
Tek
http://www.evilsuperbrain.com

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Tek wrote:

> "Bill Hails" <bil### [at] europeyahoo-inccom> wrote in message
> news:3eff65dc@news.povray.org...
>> They're a bit on the large side to post, so I've
>> linked them.
> 
> That's because they're gifs. You should post an mpeg version (I can't be
> bothered to wait for the gif to download, it's taking ages!).

sorry about that, I've dug up an mpeg_encode that should do the trick,
but after genning the gifs I deleted the pngs so I'll have to re-render
unless I can figure out how to extract ppms from an animated gif (on
linux.)

>> PS
>> Wouldn't it be nice to have a newsgroup dedicated
>> to these sorts of test renderings? Something like
>> povray.samples or somesuch? I know I'm not the only
>> one to occasionally post stuff like this :-)
> 
> I thought this newsgroup is dedicated to test renderings, people almost
> never post finished work here.

Sorry again for not being more precise. I meant test renderings that
demonstrate a specific aspect of povray, in this case type 5 scattering
and the effect of the eccentricity modifier.

Such postings may save others some of the time spent doing similar
experiments themselves.

> --
> Tek
> http://www.evilsuperbrain.com

-- 
Bill Hails

Post a reply to this message

"Bill Hails" <bil### [at] europeyahoo-inccom> wrote in message
news:3f00b286@news.povray.org...
> sorry about that, I've dug up an mpeg_encode that should do the trick,
> but after genning the gifs I deleted the pngs so I'll have to re-render
> unless I can figure out how to extract ppms from an animated gif (on
> linux.)

Ah yes, I've done that before, it's very annoying. Though on my new PC I have a
110GB hard drive so that should give enough space for a lot of renders! :)

> Such postings may save others some of the time spent doing similar
> experiments themselves.

Ah, I see what you mean, kind of as an extension to the samples that come with
povray. That's not a bad idea. Maybe a group where people post the source and
image/animation for a simple scene demonstrating an effect.

--
Tek
http://www.evilsuperbrain.com

Post a reply to this message