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> This is very interesting and it is indeed very helpful to just look at
> parts of the face instead of the whole. Great suggestion!
In a related point, when creating an image, I usually get too accustomed
to my own creation, and don't really see how well I'm doing... reversing the
image horizontally helps there, as you see the image as if it were a new,
never seen image. I read somewhere that classic painters did it using a
mirror... Another trick I figured myself was to look at the image through a
cardboard tube (no, not a toilette paper one... that one is too wide! ;).
--
Jaime Vives Piqueres
http://www.ignorancia.org
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Thomas de Groot wrote:
> "Thomas de Groot" <tDOTdegroot@interDOTnlANOTHERDOTnet> schreef in bericht
> news:4b2899b3$1@news.povray.org...
>> If and when you have some free time, it would be nice if you could write
>> down some kind of tutorial about all this.... It would be highly
>> appreciated by the Poser freaks in this community :)
>
> Ah! Just read your answer to my message below! I shall have to study that.
> Thanks.
>
> Thomas
>
>
And write a tutorial? :twisted:
--
Best Regards,
Stephen
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Jaime Vives Piqueres wrote:
> In a related point, when creating an image, I usually get too accustomed
> to my own creation, and don't really see how well I'm doing... reversing
> the image horizontally helps there, as you see the image as if it were a new,
> never seen image.
Many moons ago I was taught to look photographs upside down. That is the
photograph is upside down not me standing on my head. ;)
--
Best Regards,
Stephen
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Stephen wrote:
> Many moons ago I was taught to look photographs upside down.
Like this one? ;)
http://www.moillusions.com/2006/09/margaret-thatcher-illusion.html
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Christian Froeschlin wrote:
> Stephen wrote:
>
>> Many moons ago I was taught to look photographs upside down.
>
> Like this one? ;)
>
> http://www.moillusions.com/2006/09/margaret-thatcher-illusion.html
Yes and no. looking at the modified, upside photo, it only takes a
second or two for the mouth and eyes to jump out at you as being
No, because the images are too small to look at properly. I had been
thinking of seeing dust marks, hairs and scratches on the negatives that
were reproduced on the positives.
Well found though :D
--
Best Regards,
Stephen
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"Stephen" <mca### [at] aolDOT com> schreef in bericht
news:4b294423$1@news.povray.org...
>
> And write a tutorial? :twisted:
Well, there starts to be a need for some tutorials indeed. :)
Did I promise one? I have a number of notes that should be turned into a
tutorial. Maybe Christmas will be a good time to round that up...
Thomas
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"Stephen" <mca### [at] aolDOT com> schreef in bericht
news:4b294510$1@news.povray.org...
>
> Many moons ago I was taught to look photographs upside down. That is the
> photograph is upside down not me standing on my head. ;)
I was on the point of suggesting that technique too.... :)
Thomas
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From: Thomas de Groot
Subject: Re: Chinese Lady - testing some techniques
Date: 17 Dec 2009 05:28:25
Message: <4b2a07c9@news.povray.org>
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I have started to play with Ive's skin techniques and come up - for the time
being - with the following ideas, illustrated by the attached image.
First of all, defining a skin color means that you need to define separate
basic image_maps for the different skin features, e.g. one for the face
skin, one for the lips, one for the eye sockets, one for the skull maybe,
etc, depending on the details you want to show. This is not impossible to do
using the basic image template but it is a delicate work.
That said, for most purposes, the skin image maps provided by Poser are of
enough quality for direct use. What is often needed though is a better
control of the apparent texture of the skin, the gloss, the transparancy.
This last one could certainly be obtained by SSS but I do not want to go
into that right now. I think that others are better qualified than me to
give advice there.
The shininess or gloss of the skin can be improved however quite easily by
applying a correct finish to the skin texture. You can do this in Poseray,
by manipulating the finish box in the material section, fine-tuning later in
POV-Ray itself. Alternatively, you can define your own finish code in
Poseray or in POV-Ray. Ive's finish code with the SkinOil parameter is very
interesting for that purpose and I have modified his texture code in order
to be ablt to fully apply it to the standard skin textures of Poser.
The three images (Poser 8, Alyson figure; morphed to unique facial
characteristics) below, all with 16bps png image maps, have the following
characteristics (only the heads have been modified):
1. Original figure with minimal finish improvements (specular 0.05 roughness
0.005 for the gloss)
2. A skin material derived fro Ive's have been used, with SkinOil value
0.01. The code for the texture here is:
//the different image maps:
#declare PP_Head = pigment{p_map4}
#declare S_Head = pigment{p_map6}
#declare N_Head = normal {p_map5}
#local N_Face =
normal {
uv_mapping N_Head
bump_size 1
}
#local F_Skin_S0 =
finish {
ambient 0 diffuse 1
specular 0.01 roughness 0.11
phong 0.01 phong_size 2
brilliance 1
}
#local F_Skin_S1 =
finish {
ambient 0 diffuse 1 - 0.1 * SkinOil
specular 0.01 + 0.75 * SkinOil roughness 0.06
phong 0.01 + 0.5 * SkinOil phong_size 5
metallic 0.4 brilliance 1.05
}
#local T_Head_S0 =
texture {
pigment {uv_mapping PP_Head}
normal {N_Face}
finish {F_Skin_S0}
}
#local T_Head_S1 =
texture {
pigment {uv_mapping PP_Head}
normal {N_Face}
finish {F_Skin_S1}
}
#local M_Head =
material {
texture {
pigment_pattern {uv_mapping S_Head}
texture_map{
[0 T_Head_S0]
[1 T_Head_S1]
}
}
}
3. Same as 2 but with SkinOil value 0.1.
The results show that Ive's finish is giving a more natural aspect to the
face imo.
For the eye's cornea (the transparant outer layer), I use a material I
developed myself:
#declare F_EyeTrans=
finish {
specular 1
roughness 0.001
ambient 0
diffuse 0
reflection 0.05
}
#declare I_EyeTrans =
interior { ior 1.5 }
#declare T_EyeTrans =
texture {
pigment { rgbf<1.0, 1.0, 1.0, 0.7> }
finish { F_EyeTrans }
}
#declare M_EyeTrans =
material {
texture { T_EyeTrans }
interior { I_EyeTrans }
}
Thomas
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Attachments:
Download 'PoserFiguretest_comb.jpg' (114 KB)
Preview of image 'PoserFiguretest_comb.jpg'
![PoserFiguretest_comb.jpg](/povray.binaries.images/attachment/%3C4b2a07c9%40news.povray.org%3E/PoserFiguretest_comb.jpg?preview=1)
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Thomas de Groot wrote:
> "Stephen" <mca### [at] aolDOT com> schreef in bericht
> news:4b294423$1@news.povray.org...
>> And write a tutorial? :twisted:
>
> Well, there starts to be a need for some tutorials indeed. :)
> Did I promise one? I have a number of notes that should be turned into a
> tutorial. Maybe Christmas will be a good time to round that up...
>
Great Thomas, you have promised now ;)
--
Best Regards,
Stephen
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Thomas de Groot wrote:
> I have started to play with Ive's skin techniques and come up - for the time
> being - with the following ideas, illustrated by the attached image.
> ...
I'm glad my hastily written explanation full of typos (I was interrupted
multiple times) is already of help. And I'm in a hurry again as we are
going to see the brand new James Cameron movie this evening, I'm already
sooo curious...
-Ive
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