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Dearmad wrote:
>
> What has always bugged me about POV and is pretty clearly evident
> in the images below is the richness of colors gained in POL that
> is lost and flattened in POV. I've seen this in almost every
> image in the IRTC when I look at POV vs. almost any other
> renderer.
Call me a madman, but the only significant difference I can see is the
color of her hair and the shading on her head, and to be honest, I
prefer the POV-Ray version.
Also, GEEZ, if you must be lossless, use PNG or something next time! I
thought my modem was gonna have a stroke! X_x
-Xplo
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From: Hugo
Subject: Re: POV vs. Polyray and Colors: I feel nitpicky tonight! :o) (800kbu)
Date: 11 Jan 2002 07:34:11
Message: <3c3edbc3$1@news.povray.org>
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As I saw your pictures, I said to myself "it's the ambient light".. But I
assume you DO know that POV's ambient light is 0.1 by default? It could also
be a matter of assumed_gamma in global_settings.. You don't mention this in
your post.. Have you taken it into mind?
Regards,
Hugo
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From: Zeger Knaepen
Subject: Re: POV vs. Polyray and Colors: I feel nitpicky tonight! :o) (800kbu)
Date: 11 Jan 2002 08:28:37
Message: <3c3ee885@news.povray.org>
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I attached the difference between the POV-Ray version and the PolyRay version. The
biggest difference between them seems to be that the used PolyRay camera had a wider
viewing angle than the POV-Ray camera.
And for the differences in the colors: maybe if you increase the brilliance and
decrease
the ambient values of the POV-Ray version, it'll be more like the PolyRay version...
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
Post a reply to this message
Attachments:
Download 'difference_pov-poly.jpg' (36 KB)
Preview of image 'difference_pov-poly.jpg'
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I felt that the polyray image was "fuzzier" than the povray one and the
difference bears that out; the differences are at the boundaries/borders.
What anti-aliasing settings were used in both? Does it make a difference?
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From: Dayv
Subject: Re: POV vs. Polyray and Colors: I feel nitpicky tonight! :o) (800kbu)
Date: 11 Jan 2002 15:59:30
Message: <3c3f5232@news.povray.org>
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Obviously there is a color difference between the two... but to my naked
eye, I can't see the difference between the 6114 colors vs the 6787 colors.
Maybe it's just me...
As for the image of the difference between the two...looks kinda cool to me!
-dayv
"Zeger Knaepen" <zeg### [at] student kuleuvenacbe> wrote in message
news:3c3ee885@news.povray.org...
> I attached the difference between the POV-Ray version and the PolyRay
version. The
> biggest difference between them seems to be that the used PolyRay camera
had a wider
> viewing angle than the POV-Ray camera.
> And for the differences in the colors: maybe if you increase the
brilliance and decrease
> the ambient values of the POV-Ray version, it'll be more like the PolyRay
version...
>
> 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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On Thu, 10 Jan 2002 21:27:12 -0800, Dearmad wrote:
>Ok I finally got around to doing this using MORAY v3.1 which was
>the last version that would output to both POV and POLYRAY. What
>is it I did? A comparison between identical scenes and
>renderers. Used POL v1.8 and the POV that's the latest official
>one from the site (as of today).
Over 800K thanks.
--
Cheers
Steve email mailto:ste### [at] zeroppsuklinuxnet
%HAV-A-NICEDAY Error not enough coffee 0 pps.
web http://www.zeropps.uklinux.net/
or http://start.at/zero-pps
12:06am up 95 days, 15:55, 1 user, load average: 1.06, 1.04, 1.01
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this "differences" image does miss the color diffs- the ratios in
the red are different.
yeah I know ambient is 0.1 in POV and I took some pains to double
check as many identical numbers existed in the textures as
possible.
I can't explain the camera difference at all- the numbers ARE
exactly the same- difference in how the raytracers interpret that
I guess... odd...
thanks for the interesting image here though- some good
information.
-peter
--
Current obsession: "Ballet pour ma fille."
http://www.applesnake.net
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Xplo Eristotle wrote:
>
> Dearmad wrote:
> >
> > What has always bugged me about POV and is pretty clearly evident
> > in the images below is the richness of colors gained in POL that
> > is lost and flattened in POV. I've seen this in almost every
> > image in the IRTC when I look at POV vs. almost any other
> > renderer.
>
> Call me a madman, but the only significant difference I can see is the
> color of her hair and the shading on her head, and to be honest, I
> prefer the POV-Ray version.
Color wise you prefered it? Geometry wise too though? I'm
wondering why POV was so snippy about the bezier patches- both
images are exports in that area from MORAY...
>
> Also, GEEZ, if you must be lossless, use PNG or something next time! I
> thought my modem was gonna have a stroke! X_x
Agh, I didn't think about PNG as a possible- and having DSL has
spoiled me... but I DID warn you in the header! :oO
-peter
--
Current obsession: "Ballet pour ma fille."
http://www.applesnake.net
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Tim Riley wrote:
>
> I felt that the polyray image was "fuzzier" than the povray one and the
> difference bears that out; the differences are at the boundaries/borders.
> What anti-aliasing settings were used in both? Does it make a difference?
Hm... the aliasing shouldn't have gone as far as the differences
image said it did... should it? I think the "differences" image
needs to be defined, differences in colors? intensities?
saturation? what?
yeah that would make a difference for edges between colors, but
no- the differences are NOT all at the boundaries, the R/G ratio
to her ENTIRE hair is about a constant 4 vs. 3, that is a large
difference in interpreting what the color fo red ought to look
like between raytracers.
-peter
--
Current obsession: "Ballet pour ma fille."
http://www.applesnake.net
Post a reply to this message
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