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Hi,
I'm trying to get the gold textures in "golds.inc" to work when I have alpha
set to on in the INI file. Unfortunately, the textures end up appearing
really dull in the output. I was wondering if ayone could help.
Shark
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From: Warp
Subject: Re: Problems with textures and alpha channels...
Date: 13 Nov 2005 17:16:06
Message: <4377bb25@news.povray.org>
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Shark <nomail@nomail> wrote:
> I'm trying to get the gold textures in "golds.inc" to work when I have alpha
> set to on in the INI file. Unfortunately, the textures end up appearing
> really dull in the output. I was wondering if ayone could help.
Are you sure this is related to the alpha channel usage?
Do they not look dull when you don't use alpha channel?
If they still look dull even when you turn alpha channel off, then the
problem is elsewhere.
--
- Warp
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Shark nous apporta ses lumieres en ce 2005-11-13 13:43:
> Hi,
>
> I'm trying to get the gold textures in "golds.inc" to work when I have alpha
> set to on in the INI file. Unfortunately, the textures end up appearing
> really dull in the output. I was wondering if ayone could help.
> Shark
>
>
>
Have you tried to remove the ambient from those textures? I think that they looks
better that way.
Try using another colour for the background. It get replaced by transparent but still
show in
reflections.
--
Alain
-------------------------------------------------
AAAAAA: American Association Against Acronym Abuse and Ambiguity.
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From: Zeger Knaepen
Subject: Re: Problems with textures and alpha channels...
Date: 13 Nov 2005 18:20:06
Message: <4377ca26@news.povray.org>
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"Warp" <war### [at] tag povrayorg> wrote in message
news:4377bb25@news.povray.org...
> Shark <nomail@nomail> wrote:
> > I'm trying to get the gold textures in "golds.inc" to work when I
have alpha
> > set to on in the INI file. Unfortunately, the textures end up
appearing
> > really dull in the output. I was wondering if ayone could help.
>
> Are you sure this is related to the alpha channel usage?
>
> Do they not look dull when you don't use alpha channel?
>
> If they still look dull even when you turn alpha channel off, then
the
> problem is elsewhere.
this sounds like a bug I noticed a while ago: with using alpha-channel
the color-clipping seems to be done entirely differently. However, this
bug seems to be solved in POV-Ray 3.6.1
cu!
--
#macro G(b,e)b+(e-b)*C/50#end#macro _(b,e,k,l)#local C=0;#while(C<50)
sphere{G(b,e)+3*z.1pigment{rgb G(k,l)}finish{ambient 1}}#local C=C+1;
#end#end _(y-x,y,x,x+y)_(y,-x-y,x+y,y)_(-x-y,-y,y,y+z)_(-y,y,y+z,x+y)
_(0x+y.5+y/2x)_(0x-y.5+y/2x) // ZK http://www.povplace.com
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From: Marc Jacquier
Subject: Re: Problems with textures and alpha channels...
Date: 14 Nov 2005 03:15:45
Message: <437847b1@news.povray.org>
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news:web.437789047eadb4107ed350230@news.povray.org...
> Hi,
>
Hi
Mayby it is the lack of environnement.
A reflecting texture is only reflecting if it has something to reflect. (QOD
;-)
Marc
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From: Zeger Knaepen
Subject: Re: Problems with textures and alpha channels...
Date: 14 Nov 2005 06:57:12
Message: <43787b98$1@news.povray.org>
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> this sounds like a bug I noticed a while ago: with using alpha-channel
the color-clipping seems to be done entirely differently. However,
> this bug seems to be solved in POV-Ray 3.6.1
on second thought... the mosaic-preview looks ok, but the final render
doesn't :(
example-scene:
camera {location -z look_at 0}
light_source {<500,500,-500> rgb 1}
sphere {0,.2 pigment {red 1} finish {specular 1 diffuse 1}}
ini-settings:
+sp8 +ep4 +ua
Tested in MegaPOV 1.1 and POV-Ray 3.6.1, under Windows XP SP1, Athlon XP
2500+ 1GB RAM
cu!
--
#macro G(b,e)b+(e-b)*C/50#end#macro _(b,e,k,l)#local C=0;#while(C<50)
sphere{G(b,e)+3*z.1pigment{rgb G(k,l)}finish{ambient 1}}#local C=C+1;
#end#end _(y-x,y,x,x+y)_(y,-x-y,x+y,y)_(-x-y,-y,y,y+z)_(-y,y,y+z,x+y)
_(0x+y.5+y/2x)_(0x-y.5+y/2x) // ZK http://www.povplace.com
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Maybe I will try rendering at twice the normal image size, then use mosaic
preview until it's at the desired 'resolution', and finally resize the
output by 1/2.
"Zeger Knaepen" <zeg### [at] povplacecom> wrote:
> on second thought... the mosaic-preview looks ok, but the final render
> doesn't :(
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From: Zeger Knaepen
Subject: Re: Problems with textures and alpha channels...
Date: 14 Nov 2005 18:20:20
Message: <43791bb4$1@news.povray.org>
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"Shark" <nomail@nomail> wrote in message
news:web.4378f0ed81eeb59294338110@news.povray.org...
> Maybe I will try rendering at twice the normal image size, then use
mosaic
> preview until it's at the desired 'resolution', and finally resize the
> output by 1/2.
POV-Ray doesn't save the mosaic preview, and there's no AA, so that's
not really a good approach, I'm afraid :(
cu!
--
#macro G(b,e)b+(e-b)*C/50#end#macro _(b,e,k,l)#local C=0;#while(C<50)
sphere{G(b,e)+3*z.1pigment{rgb G(k,l)}finish{ambient 1}}#local C=C+1;
#end#end _(y-x,y,x,x+y)_(y,-x-y,x+y,y)_(-x-y,-y,y,y+z)_(-y,y,y+z,x+y)
_(0x+y.5+y/2x)_(0x-y.5+y/2x) // ZK http://www.povplace.com
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