Had to do this for a uni recently just to get us into the swing of things.
Dont know how many people here will recognise this or know what im talking
about but here it is

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"Jon de Vries" <Jon### [at] btinternetcom> schreef in bericht
news:3fc0d7e6@news.povray.org...
> Had to do this for a uni recently just to get us into the swing of things.
> Dont know how many people here will recognise this or know what im talking
> about but here it is

Are you the one I helped with this, on #povray ? or is this just a coincidence
:)

Looks good, but I have the feeling there's something missing...
Let's see :)

The transparent sphere should have some reflection, and the reflecting sphere
should have some diffuse reflection.

You know what, I'm gonna try this too :)

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 AKA Gaeriel http://www.povplace.be.tf

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"Zeger Knaepen" <zeg### [at] studentkuleuvenacbe> schreef in bericht
news:3fc20950$1@news.povray.org...
> You know what, I'm gonna try this too :)

here you go :p

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 AKA Gaeriel http://www.povplace.be.tf

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I wasn't the one that you helped on #povray although i can imagine it was
someone from my uni !!!!

I have attatched the original image.  No offence (especially since im a real
beginner) but i think mine looks more accurate to the original - what do
other people think??




"Zeger Knaepen" <zeg### [at] studentkuleuvenacbe> wrote in message
news:3fc21f24@news.povray.org...
> "Zeger Knaepen" <zeg### [at] studentkuleuvenacbe> schreef in bericht
> news:3fc20950$1@news.povray.org...
> > You know what, I'm gonna try this too :)
>
> here you go :p
>
> 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 AKA Gaeriel
http://www.povplace.be.tf
>
>
>

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Attachments:
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"Jon de Vries" <Jon### [at] btinternetcom> schreef in bericht
news:3fcbaa3d@news.povray.org...
> I wasn't the one that you helped on #povray although i can imagine it was
> someone from my uni !!!!
>
> I have attatched the original image.  No offence (especially since im a real
> beginner) but i think mine looks more accurate to the original - what do
> other people think??

This was the reference I used:
http://www.webcon.net/~imorgan/3d/spheres/original.jpg

imho mine is a more accurate reconstruction :)

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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Hi.

Im a real beginner and am trying to recreate this image to get into the
swing of things. I think im getting there but have no idea how to create
the transparent sphere. All the ones ive attempted have created an upside
down version of the checkered floor. Any help on where to start would be
much appreciated.

Thanks

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Wasn't it Junkboy316 who wrote:
>Hi.
>
>Im a real beginner and am trying to recreate this image to get into the
>swing of things. I think im getting there but have no idea how to create
>the transparent sphere. All the ones ive attempted have created an upside
>down version of the checkered floor. Any help on where to start would be
>much appreciated.

I think it's a bubble, something like this

difference {
  sphere { 0,2}
  sphere { 0,1.9}
  pigment {rgbt <1,1,1,0.9>}
  finish {phong 0.3 phong_size 100}  
  interior {ior 1.1}
}

In fact, I suspect that it may well be half a bubble. I can't think of
any other way for POV to omit the second highlight. Perhaps the software
he was using back then couldn't manage the second highlight.

difference {
  sphere { 0,2}
  sphere { 0,1.9}
  plane {-z,0}
  pigment {rgbt <1,1,1,0.9>}
  finish {phong 0.3 phong_size 100}  
  interior {ior 1.1}
}

-- 
Mike Williams
Gentleman of Leisure

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Junkboy316 nous apporta ses lumieres en ce 2005-10-28 06:00:
> Hi.
> 
> Im a real beginner and am trying to recreate this image to get into the
> swing of things. I think im getting there but have no idea how to create
> the transparent sphere. All the ones ive attempted have created an upside
> down version of the checkered floor. Any help on where to start would be
> much appreciated.
> 
> Thanks
> 
> 
To create a transparent sphere, or any object, you need to use a filtering or
transmiting pigment. 
You can add "filter <value>", "transmit <value>" or both after the pigment. You can
also include the 
filter and/or transmit into the pigment deffinition like pigment{rgbf <1, 0.5, 0.2,
0.5>}//filtering
pigment{rgbt <1, 0.5, 0.2, 0.37>}//transmiting
pigment{rgbft <1, 0.5, 0.2, 0.4, 0.5>}//both filtering and transmiting

Maybe the plane is set above the camera. Try using a negative value in your plane
definition like 
plane{ y, -1 pigment{checker}}
If you want your transparent sphere to look more solid, add the following:
interior{ior 1.5}
This will make it refract the background like if it was made out of glass. Without
this, it looks 
more like a bubble.
You need to add phong or specular in the finish if you want highlights, you can use
both if you 
want. You will get hilights from both the near and far surfaces.
You may want to add some reflection, try adding "reflection 0.3" in the finish, try
farious values.
I will keep the more advanced stuff for later.

-- 
Alain
-------------------------------------------------
Hard work pays off in the future. Laziness pays off now.

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