POV-Ray : Newsgroups : povray.binaries.images : 8-Ball (47kb) Server Time
14 Aug 2024 13:25:35 EDT (-0400)
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From: Daniel Nilsson
Subject: Re: 8-Ball (47kb)
Date: 13 Nov 2002 06:57:12
Message: <3dd23e18$1@news.povray.org>
"Zeger Knaepen" <zeg### [at] studentkuleuvenacbe> wrote in message
news:3dd18fbf$1@news.povray.org...
> Whatever you do, DON'T use an ambient value higher than 0 for
non-light-emitting
> objects.  A higher diffuse value and a lower reflection value (for the
white
> part), and maybe some blurred reflection, would be nice though.

Blured reflection would be cool. How is it done?

> BTW: I really like the normal on the plane! :)

Thanks!

--
Daniel Nilsson


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From: Daniel Nilsson
Subject: Re: 8-Ball (47kb)
Date: 13 Nov 2002 06:58:46
Message: <3dd23e76$1@news.povray.org>
"Corey Woodworth" <sch### [at] hotmailcom> wrote in message
news:3dd1b54a$1@news.povray.org...
> It would be cool if you had the other balls scattered around in the scene
> off camera but still reflected in the 8-ball.

I'll try that. Will make the reflections more interesting.

--
Daniel Nilsson


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From: Daniel Nilsson
Subject: Re: 8-Ball (47kb)
Date: 13 Nov 2002 07:03:00
Message: <3dd23f74$1@news.povray.org>
"Andrew Wilcox" <awi### [at] unpuzzledcom> wrote in message
news:3dd17a8e@news.povray.org...
> It looks to me like the "window" is directly above the pool table.  Maybe
> placing the window to the left of the ball where a window would usually
be,
> and oriented like it's on a wall would help.  I think it's very good
> already.  The highlight just seems to big and not oriented correctly tho.

It's no window it's flourescent lights hanging abowe the table. Maybe they
are not the right shape, I will try longer and thinner and see how that
looks.

--
Daniel Nilsson


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From: Zeger Knaepen
Subject: Re: 8-Ball (47kb)
Date: 13 Nov 2002 07:03:48
Message: <3dd23fa4$1@news.povray.org>
"Daniel Nilsson" <dan### [at] daniel-nilssoncom> schreef in bericht
news:3dd23e18$1@news.povray.org...
> Blured reflection would be cool. How is it done?
http://www.students.tut.fi/~warp/povQandT/languageQandT.html#blurredreflection


cu!
--
camera{location-z*3}#macro G(b,e)b+(e-b)*(C/50)#end#macro L(b,e,k,l)#local C=0
;#while(C<50)sphere{G(b,e),.1pigment{rgb G(k,l)}finish{ambient 1}}#local C=C+1
;#end#end L(y-x,y,x,x+y)L(y,-x-y,x+y,y)L(-x-y,-y,y,y+z)L(-y,y,y+z,x+y)L(0,x+y,
<.5,1,.5>,x)L(0,x-y,<.5,1,.5>,x)               // ZK http://www.povplace.be.tf


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From: Daniel Nilsson
Subject: Re: 8-Ball (47kb)
Date: 13 Nov 2002 07:08:32
Message: <3dd240c0@news.povray.org>
"Ross Litscher" <lit### [at] osuedu> wrote in message
news:3dd19ef3@news.povray.org...
> Maybe a stained glass type light fixture instead of just the white lights?
> How about a pool cue someplace leaning against the table that gets
> reflected? other balls on the table getting relfected maybe?

The stained glass idea is good but I don't know if I can do it.
I will add more objects around the 8-ball.

> Nice "8" though. I agree with someone who said the white needs to be
> brighter.

Thanks, the "8" is quite accuratly modeled after my real 8-ball.

--
Daniel Nilsson


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From: Daniel Nilsson
Subject: Re: 8-Ball (47kb)
Date: 13 Nov 2002 07:09:12
Message: <3dd240e8@news.povray.org>
"Marc Jacquier" <jac### [at] wanadoofr> wrote in message
news:3dd15f20$1@news.povray.org...
> I'd try variable reflection 0,1

I'll try that.

--
Daniel Nilsson


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From: Daniel Nilsson
Subject: Re: 8-Ball (47kb)
Date: 13 Nov 2002 07:19:59
Message: <3dd2436f@news.povray.org>
"Xplo Eristotle" <xpl### [at] infomagicnet> wrote in message
news:3dd1c4b5@news.povray.org...
> The reflection seems WAY too strong. Try reducing it a lot.. say, to a
> fifth of it's current value (I'm guessing, so fiddle around).
> Alternately, you could try using variable reflection, which might be
> more accurate for an 8-ball; I don't have one to examine myself.

I looked closely on my real 8-ball and I'm allmost sure the reflections are
variable.

> The white part needs to be brighter. I don't know if this is a
> pigmentation problem, a lighting problem, or if you've reduced the
> diffuse finish of the ball to compensate for the reflection (if so,
> recalculate a new diffuse finish to correspond to the much lower
> reflection you should be using. If not, consider doing this to get more
> realistic reflective objects; anything that reflects most of the light
> hitting it won't diffuse very much).

You're right. I will change both the finnish and the light: Less reflection
and more light.

> You might consider making the black parts just SLIGHTLY whiter than pure
> black. Very few things in the world even approach being so utterly black
> that they can't be illuminated at all, which is the effect that rgb 0
> will produce in POV-Ray.

It is not pure black as it is (0.1 gray), but maybe it should be a little
bit whiter still.

> As far as your environment.. adding more things to reflect will not only
> make your reflections more interesting, but they'll provide more
> surfaces for radiosity to interact with, which in turn will make your
> lighting more interesting. I highly recommend filling in the blanks. As
> to what to add to the scene: well, you HAVE a pool table! So stand next
> to it and look around. What else do you have?

Good point. I will build a simple room around the table (which is just a
infinite plane right now).

> Increase count. There are other factors that affect the number, size,
> and general appearance of radiosity artifacts, but when it comes to just
> getting rid of them, it mainly boils down to count.

What do you consider a good value for count?

Thanks for the suggestions.

--
Daniel Nilsson


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From: Daniel Nilsson
Subject: Re: 8-Ball (47kb)
Date: 13 Nov 2002 07:24:30
Message: <3dd2447e$1@news.povray.org>
"TinCanMan" <Tin### [at] hotmailcom> wrote in message
news:3dd1c578@news.povray.org...
> Good start!

Thanks!

> (If you are using 3.5) Try using fresnel type variable reflection (my
> favourite!) use conserve_energy and set ior between maybe 1.2 and 1.4
(play
> around til you get what you want.  As others said, don't use ambient
greater
> than 0 (unless you really want to of course).  Adjust the diffuse value
> instead.

Yes, I'm using 3.5. I will try what you said.

> BTW here is one of the very first images I ever made after discovering
POV.
> The Image has a date stamp of 12/8/1997.  Perhaps I should redo the image
> sometime using the new techniques. (I don't have the source anymore
though)

Cool, seems like everyone starts with "spheres and a plane" type of images
:)

--
Daniel Nilsson


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From: Xplo Eristotle
Subject: Re: 8-Ball (47kb)
Date: 13 Nov 2002 08:14:24
Message: <3dd25030@news.povray.org>
Daniel Nilsson wrote:
> 
> What do you consider a good value for count?

Whatever does the job within your requirements for rendering speed and 
memory use is a good value. You're going to have to experiment to find 
it. Start raising it by increments and doing test renders.

-Xplo


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From: Andrew Coppin
Subject: Re: 8-Ball (47kb)
Date: 15 Nov 2002 16:57:08
Message: <3dd56db4@news.povray.org>
Hey, neat!

Andrew.


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