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First W.I.P.
I wish there was a way to make the atmosphere thin enough to still see the colors of
the sky sphere.
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Bryan Valencia wrote:
> First W.I.P.
>
> I wish there was a way to make the atmosphere thin enough to still see
> the colors of the sky sphere.
and now the attachment.
Post a reply to this message
Attachments:
Download 'media-atmosphere.jpg' (65 KB)
Preview of image 'media-atmosphere.jpg'
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Bryan Valencia nous illumina en ce 2008-07-23 17:30 -->
> First W.I.P.
>
> I wish there was a way to make the atmosphere thin enough to still see
> the colors of the sky sphere.
With various patterns, you can make thick enough near the ground but thin enough
so that you can still see the sky.
Try the planar pattern. It evaluate as 1 on the x-z plane and drop linearly to
zero one unit up and down. You just need to scale it apropiately. You can also
use some of the wave forms variations to change the rate ov change.
scalop_wave will stay high near the ground and drop sharply near the top for
example.
--
Alain
-------------------------------------------------
Agnostic: What is this shit?
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Alain wrote:
> Bryan Valencia nous illumina en ce 2008-07-23 17:30 -->
>> First W.I.P.
>>
>> I wish there was a way to make the atmosphere thin enough to still see
>> the colors of the sky sphere.
> With various patterns, you can make thick enough near the ground but
> thin enough so that you can still see the sky.
> Try the planar pattern. It evaluate as 1 on the x-z plane and drop
> linearly to zero one unit up and down. You just need to scale it
> apropiately. You can also use some of the wave forms variations to
> change the rate ov change.
> scalop_wave will stay high near the ground and drop sharply near the top
> for example.
>
ok, maybe I'm just dense (pun intended)
But I added the 2 densities and my media effect disappeared while the sky was still
white.
This is my media
media {
intervals 20
scattering { 4, rgb 0.01 }
samples 2, 10
confidence 0.9999
variance 1/1000
ratio 0.9
// density {planar scale y*5 }
// density {granite scale 0.1}
}
The two // lines are the ones I added.
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"Bryan Valencia" <no### [at] way com> schreef in bericht
news:4887f27d$1@news.povray.org...
>
> ok, maybe I'm just dense (pun intended)
> But I added the 2 densities and my media effect disappeared while the sky
> was still white.
>
> This is my media
>
> media {
> intervals 20
> scattering { 4, rgb 0.01 }
> samples 2, 10
> confidence 0.9999
> variance 1/1000
> ratio 0.9
> // density {planar scale y*5 }
> // density {granite scale 0.1}
> }
>
> The two // lines are the ones I added.
As a start, try this from one of my scenes. The parameter SkyScale scales
the sphere used as a sky.
Also, remember to always use intervals = 1 as the default method is 3.
//start code
background {Black}
sphere { <0, 0, 0>, 1
texture {pigment {rgb 0 transmit 1} }
interior_texture {
pigment {
gradient y
color_map {
[0.0 rgb <0.6,0.7,1.0>*0.3 transmit 0.3]
[0.7 rgb <0.0,0.1,0.8>*0.3 transmit 0.3]
}
}
finish {ambient 1 diffuse 0}
}
scale SkyScale
hollow
#if (Atmo)
interior {
media {
intervals 1
scattering {2, rgb 0.3/SkyScale}
samples 300
confidence 0.9999
variance 1/1000
ratio 0.9
}
}
#end
}
//end code
Thomas
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Bryan Valencia nous illumina en ce 2008-07-23 23:09 -->
> Alain wrote:
>> Bryan Valencia nous illumina en ce 2008-07-23 17:30 -->
>>> First W.I.P.
>>>
>>> I wish there was a way to make the atmosphere thin enough to still
>>> see the colors of the sky sphere.
>> With various patterns, you can make thick enough near the ground but
>> thin enough so that you can still see the sky.
>> Try the planar pattern. It evaluate as 1 on the x-z plane and drop
>> linearly to zero one unit up and down. You just need to scale it
>> apropiately. You can also use some of the wave forms variations to
>> change the rate ov change.
>> scalop_wave will stay high near the ground and drop sharply near the
>> top for example.
>>
>
>
> ok, maybe I'm just dense (pun intended)
> But I added the 2 densities and my media effect disappeared while the
> sky was still white.
>
> This is my media
>
> media {
> intervals 20
> scattering { 4, rgb 0.01 }
> samples 2, 10
> confidence 0.9999
> variance 1/1000
> ratio 0.9
> // density {planar scale y*5 }
> // density {granite scale 0.1}
> }
>
> The two // lines are the ones I added.
If your sky is still white, maybe your sky have a problem. Completely remove the
media and see if the sky is OK.
Concerning your media:
The default method is method 3. With this method, you should keep intervals 1
and increase samples. Also, this method only use the first samples value and
ignore the second value. The documentation have not been updated for version 3.6
and is only correct if you use method 1 or 2.
The defaults are:
method 3
intervels 1
samples 3
Made a test scene, background used for a blue sky.
Try with the planar pattern enabled, OK. Media present, sky visible.
Uncomment the granite density. Much slower, (may be beter to use some
turbulence) "sky" still visible, media present.
--
Alain
-------------------------------------------------
SHOPPING MATH
A man will pay $20 for a $10 item he needs.
A woman will pay $10 for a $20 item that she doesn't need.
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well I'm sure I did this wrong, but there was no combination that I could get the
results I wanted.
media {
method 3
intervals 1
scattering { 2, rgb 0.0002 }
samples 10, 1000
confidence 0.9999
variance 1/1000
ratio 0.9
density {planar scale y*55 }
//density {granite turbulence 2 scale 0.1}
density {bumps turbulence 2 scale 20}
}
gives this.
Post a reply to this message
Attachments:
Download 'media-atmosphere2.jpg' (66 KB)
Download 'media-atmosphere3.jpg' (89 KB)
Preview of image 'media-atmosphere2.jpg'
Preview of image 'media-atmosphere3.jpg'
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I tried these setting Thomas and it took an hour to render 1/8th of the picture.
Honestly, there MUST be a better way.
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"Bryan Valencia" <no### [at] waycom> schreef in bericht
news:488a58c9$1@news.povray.org...
>I tried these setting Thomas and it took an hour to render 1/8th of the
>picture.
>
> Honestly, there MUST be a better way.
Hmm. Mostly the sky and buildings would take time I suppose. The lower half
should be faster. Nonetheless, the slowness seems not too prohibitive to me.
In a two pass render, it would perhaps be more efficient.
Thomas
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Bryan Valencia nous illumina en ce 2008-07-25 18:46 -->
> well I'm sure I did this wrong, but there was no combination that I
> could get the results I wanted.
>
> media {
> method 3
> intervals 1
> scattering { 2, rgb 0.0002 }
> samples 10, 1000
This does the same: samples 10
> confidence 0.9999
> variance 1/1000
> ratio 0.9
> density {planar scale y*55 }
> //density {granite turbulence 2 scale 0.1}
> density {bumps turbulence 2 scale 20}
> }
>
>
> gives this.
>
>
Geting beter, at least, now, you can see the sky.
You may try using 2 medias:
The current one and one, thinner, using scattering{4, rgb<0,0.2,1>*0.00001 ...}
--
Alain
-------------------------------------------------
My wife is such a bad cook, in my house we pray after the meal.
Rodney Dangerfield
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I give up.
No matter what I try (and I have wasted about 16 hours on it) the atmosphere effect I
want is always gone well before I
can see any sky. Geez, this is just too f'ing hard.
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Alain <ele### [at] netscapenet> wrote:
> Bryan Valencia nous illumina en ce 2008-07-23 17:30 -->
> > First W.I.P.
> >
> > I wish there was a way to make the atmosphere thin enough to still see
> > the colors of the sky sphere.
> With various patterns, you can make thick enough near the ground but thin enough
> so that you can still see the sky.
> Try the planar pattern. It evaluate as 1 on the x-z plane and drop linearly to
> zero one unit up and down. You just need to scale it apropiately. You can also
> use some of the wave forms variations to change the rate ov change.
> scalop_wave will stay high near the ground and drop sharply near the top for
> example.
>
> --
> Alain
> -------------------------------------------------
> Agnostic: What is this shit?
The Agnostic is not living a significant life. Such was only meant to be known
on a personal level. Whats worse is, if you had a reason to know but forgot.
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"alphaQuad" <alp### [at] earthlinknet> a écrit dans le message de news:
web.488e29a9c102e2e8dc0a30e20@news.povray.org...
> The Agnostic is not living a significant life.
please define "significant life"
Marc
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alphaQuad nous illumina en ce 2008-07-28 16:18 -->
>> -------------------------------------------------
>> Agnostic: What is this shit?
>
> The Agnostic is not living a significant life. Such was only meant to be known
> on a personal level. Whats worse is, if you had a reason to know but forgot.
>
An agnostic don't beleive in a God. It don't mean that he don't beleive in some
Greater Power. An agnostic will NEVER say that there is no God, like an atheist
does...
--
Alain
-------------------------------------------------
You know you've been raytracing too long when you call in sick in order to render.
David Kraics
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On Mon, 28 Jul 2008 16:18:49 -0400, alphaQuad wrote:
> The Agnostic is not living a significant life.
Bull.
The agnostic is just saying "I don't know if there is a god or not".
But who are you to judge? Does not the bible state "judge not, lest ye
be judged"?
Jim
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alphaQuad wrote:
> Whats worse is, if you had a reason to know but forgot.
Like: you really *knew* there was no god while
trying to compile pov with mingw on win98se ;)
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Jim Henderson wrote:
> On Mon, 28 Jul 2008 16:18:49 -0400, alphaQuad wrote:
>
>> The Agnostic is not living a significant life.
>
> Bull.
>
> The agnostic is just saying "I don't know if there is a god or not".
>
> But who are you to judge? Does not the bible state "judge not, lest ye
> be judged"?
>
> Jim
<soapbox>
Apologies for being so off-topic, but Matthew 7 is being abused here. You should not
quote Jesus Christ out of context
like this. Read the passage in the context of the teaching. I know non-Christians
like to whip this verse out whenever
they want to do something immoral - just to shut the Christians up, but Matthew 7 just
can't be intelligently
interpreted to mean that.
The verse doesn't advise use to tell each other not to "judge" us, it's an admonition
against feeling like we're "good"
by comparing ourselves to someone else. The verse is about holding ourselves to God's
standard for us, it's not for
unbelievers to stop all criticism from believers.
</soapbox>
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Bryan Valencia wrote:
> I give up.
>
> No matter what I try (and I have wasted about 16 hours on it) the
> atmosphere effect I want is always gone well before I can see any sky.
> Geez, this is just too f'ing hard.
Perhaps what I want is unrealistic, but it does exist in reality.
I want there to be blue sky, a slight amount of atmosphere, so I can see the giant
triangular volumetric shadows of the
buildings in the air. I used to marvel at the sight of that when I worked in San
Fransisco.
Oh, and another criteria is that I want it to render before my grandkids die of old
age.
:)
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On Tue, 29 Jul 2008 21:53:54 -0700, Bryan Valencia wrote:
> Jim Henderson wrote:
>> On Mon, 28 Jul 2008 16:18:49 -0400, alphaQuad wrote:
>>
>>> The Agnostic is not living a significant life.
>>
>> Bull.
>>
>> The agnostic is just saying "I don't know if there is a god or not".
>>
>> But who are you to judge? Does not the bible state "judge not, lest ye
>> be judged"?
>>
>> Jim
>
> <soapbox>
> Apologies for being so off-topic, but Matthew 7 is being abused here.
> You should not quote Jesus Christ out of context like this. Read the
> passage in the context of the teaching. I know non-Christians like to
> whip this verse out whenever they want to do something immoral - just to
> shut the Christians up, but Matthew 7 just can't be intelligently
> interpreted to mean that.
>
> The verse doesn't advise use to tell each other not to "judge" us, it's
> an admonition against feeling like we're "good" by comparing ourselves
> to someone else. The verse is about holding ourselves to God's standard
> for us, it's not for unbelievers to stop all criticism from believers.
> </soapbox>
Of course, if I were to whip out my soapbox, I'd say something about it
only being reasonable to quote things out of context when it's to
*support* a Christian point of view; I've seen it *many* times over the
years.
What's good for the goose is good for the gander.
Jim
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On 30 Jul 2008 16:26:51 -0400, Jim Henderson <nos### [at] nospamcom>
wrote:
>On Tue, 29 Jul 2008 21:53:54 -0700, Bryan Valencia wrote:
>
>> Jim Henderson wrote:
>>> On Mon, 28 Jul 2008 16:18:49 -0400, alphaQuad wrote:
>>>
>>>> The Agnostic is not living a significant life.
>>>
>>> Bull.
>>>
>>> The agnostic is just saying "I don't know if there is a god or not".
>>>
>>> But who are you to judge? Does not the bible state "judge not, lest ye
>>> be judged"?
>>>
>>> Jim
>>
>> <soapbox>
>> Apologies for being so off-topic, but Matthew 7 is being abused here.
>> You should not quote Jesus Christ out of context like this. Read the
>> passage in the context of the teaching. I know non-Christians like to
>> whip this verse out whenever they want to do something immoral - just to
>> shut the Christians up, but Matthew 7 just can't be intelligently
>> interpreted to mean that.
>>
>> The verse doesn't advise use to tell each other not to "judge" us, it's
>> an admonition against feeling like we're "good" by comparing ourselves
>> to someone else. The verse is about holding ourselves to God's standard
>> for us, it's not for unbelievers to stop all criticism from believers.
>> </soapbox>
>
>Of course, if I were to whip out my soapbox, I'd say something about it
>only being reasonable to quote things out of context when it's to
>*support* a Christian point of view; I've seen it *many* times over the
>years.
>
>What's good for the goose is good for the gander.
>
>Jim
The problem with this is that you will never convince someone who
belives in mythology. You might just as well have tried to convince
an acient Greek, Roman or Viking that they were wrong. They all had
writings of some sort to "prove" that they were right
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On Sat, 02 Aug 2008 09:34:34 +0100, john wrote:
> The problem with this is that you will never convince someone who
> belives in mythology. You might just as well have tried to convince an
> acient Greek, Roman or Viking that they were wrong. They all had
> writings of some sort to "prove" that they were right
That's certainly true enough....
Jim
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Bryan Valencia <no### [at] waycom> wrote:
> Bryan Valencia wrote:
> > First W.I.P.
> >
> > I wish there was a way to make the atmosphere thin enough to still see
> > the colors of the sky sphere.
> and now the attachment.
I think it is largely a question of angle of incidence (depending on your
scattering type) and clipping so that the media doesn't extend too far. It can
be done, but does require tweaking. If you post your source, I may be able to
help.
Test/example image attached, rendered it and saved radiosity without media, then
loaded saved radiosity file for the final trace. Machine is a P4 3.00GHz single
core. Media was constrained to the top half of a sphere 100 units in radius.
Render statistics:
Total Time: 0 hours 3 minutes 20 seconds (200 seconds)
CPU time used: kernel 0.50 seconds, user 196.98 seconds, total 197.48 seconds
Render averaged 2430.57 PPS over 480000 pixels
Media block used:
//-------------- start code
media
{
intervals 1
samples 100
confidence 1 - 1/255
variance 1/255
ratio 0.9 // adjust for scattering media
scattering
{
1, color rgb <1,.9,.75> / 200
extinction 0.5 // for balancing amount of absorption [1.0]
}
method 3 // adaptive sampling
aa_threshold 0.1 // accuracy threshold for method 3 [0.1]
aa_level 4 // maximum recursion depth for method 3 [4]
density{ color rgb <1,1,1> }
}
//-------------- end code
Post a reply to this message
Attachments:
Download 'news_atmo2.jpg' (108 KB)
Preview of image 'news_atmo2.jpg'
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"alphaQuad" <alp### [at] earthlinknet> wrote:
>
> The Agnostic is not living a significant life. Such was only meant to be known
> on a personal level. Whats worse is, if you had a reason to know but forgot.
Pardon me, but who are you to say that someone else is not living a significant
life? Can make such a profound categorical statement about people's lives
based on a mere difference of opinion?
Are you referring to the agnostic's refusal to aver what he doesn't know, or to
an agnostic's having insufficient reason to believe in God? If the latter,
then are you aware that Gene Roddenberry was an atheist? Was *his* life
insignificant?
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Bryan Valencia <no### [at] waycom> wrote:
>
> Apologies for being so off-topic, but Matthew 7 is being abused here. You should not
quote Jesus Christ out of contex
t
> like this. Read the passage in the context of the teaching. I know non-Christians
like to whip this verse out whene
ver
> they want to do something immoral -
No, non-Christians like to whip this verse out when Christians won't mind their
own business.
> - just to shut the Christians up...
You got that part right. Read verse 6, same chapter.
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