How much time would it need, when these cups would be filled with 
different
juices?

Le'mme see:  subsurface scattering with scattering media... hmmm, about 3 
months? ;)

> The final result isn't a waste of time!!

thanks.  you're very kind, but it really is:  the shadows are too sharp 
and there are no caustics 
to feel realistic.
And no, I'm not trying those... :P

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> It all began with a challenge in a brazilian forum, when some guy claimed this
> scene:
> http://200.213.105.41/greysilica/exemplos/cjcopojateado.png
> 
> took him 48 hours to render with Blender internal renderer.
> 
> Surely something was wrong, or so I thought.  Well, in the region between the
> bottom of second row cups and the top of first row cups, render time was about
> 11 minutes a line!  It is all about refractions, normals and fresnel
> reflections.  40 hours total on a P4 2.66 with povray 3.6.1...
> 

I forgot to mention: I definitely prefer your image than the original :)

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> And I didn't even go with media for blurry shadows, area_lights, 
> radiosity and caustics!  

I'm trying a render with area_light and focal blur right now.

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Nicolas Alvarez <nic### [at] gmailisthebestcom> wrote:
> light_source {
>    1.6*(4-z*8)+y*8
>    1.2
>    area_light
>    x,y,4,4
>    circular orient jitter

oh, my!  do I spot an area_light?  I envy your renderfarm! ;)

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Nicolas Alvarez <nic### [at] gmailisthebestcom> wrote:

> > [global settings, background, cup, and tex unmodified from original,
> > snipping to make post shorter]
> >
>
> Well, I did change rgb with rgbft on the texture :)
>
> PS: you're posting in HTML again.

not anymore!  My Notes died for good.  I'll keep with the proxy-blocked web
interface that happens to work once in a while.  Unless you can zip and mail me
thunderbird, since I was too lazy to remail or save it to thumbdrive it during
weekend... :P

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Nicolas Alvarez <nic### [at] gmailisthebestcom> wrote:

> > It all began with a challenge in a brazilian forum, when some guy claimed this
> > scene:
> > http://200.213.105.41/greysilica/exemplos/cjcopojateado.png
> >
> > took him 48 hours to render with Blender internal renderer.
> >
> > Surely something was wrong, or so I thought.  Well, in the region between the
> > bottom of second row cups and the top of first row cups, render time was about
> > 11 minutes a line!  It is all about refractions, normals and fresnel
> > reflections.  40 hours total on a P4 2.66 with povray 3.6.1...
> >
>
> I forgot to mention: I definitely prefer your image than the original :)

you povray fanboy! :P

anyway, I felt the colors ended up a bit washed up.  But I definitely liked the
reflections a lot more.  His just show the closer cups.  I wonder if he did
limit it somehow, just for the reflections, no refractions.  I wonder if it'd
be possible for us to have a max_trace_level separate for reflections and
refractions...

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> Nicolas Alvarez <nic### [at] gmailisthebestcom> wrote:
>> I forgot to mention: I definitely prefer your image than the original :)
> 
> you povray fanboy! :P

Fanboy me? It's not like I'm a Pov-addict or anything.

Oh wait, my domain name is povaddict.com.ar.

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Beauty just takes time... At least, they look very beautiful.

Sven




"nemesis" <nam### [at] gmailcom> schrieb im Newsbeitrag 
news:web.479d2dce9dfdbbcc571699ff0@news.povray.org...
> so, any free time in your hands?  want to put that quad core to stress 
> with
> povray 3.7beta?  If you're, try the little scene below.  With +AM2 +A0.04 
> +J1.0
> 1024X768 on a P4 2.66, it just brought my PC to a crawl for the whole 
> weekend!
> It all began with a challenge in a brazilian forum, when some guy claimed 
> this
> scene:
> http://200.213.105.41/greysilica/exemplos/cjcopojateado.png
>
> took him 48 hours to render with Blender internal renderer.
>
> Surely something was wrong, or so I thought.  Well, in the region between 
> the
> bottom of second row cups and the top of first row cups, render time was 
> about
> 11 minutes a line!  It is all about refractions, normals and fresnel
> reflections.  40 hours total on a P4 2.66 with povray 3.6.1...
>
> I'm sure it's possible to optimize it with some no_image, no_shadow 
> trickery
> with doubles and no_reflection in the main cups, but I didn't thought of 
> it
> beforehand!
>
>
> global_settings { max_trace_level 40 }
>
> background { rgb 1 }
>
> #local cup =
> lathe { bezier_spline
> 48, //nr points
> /* 0*/ <0, 2.8571826>, <174.28571, 2.8571826>, <197.14286,2.8571826>,
> <197.14286,2.8571826>,
> /* 1*/ <197.14286, 2.8571826>, <197.14286, 2.8571826>, 
> <211.42857,-2.8571174>,
> <228.57143,14.285683>,
> /* 2*/ <228.57143, 14.285683>, <245.71429, 31.428583>, 
> <242.85714,85.714283>,
> <242.85714,85.714283>,
> /* 3*/ <242.85714, 85.714283>, <242.85714, 85.714283>, 
> <265.71429,80.000003>,
> <291.42857,105.71428>,
> /* 4*/ <291.42857, 105.71428>, <317.14286, 131.42857>, 
> <308.57143,108.57143>,
> <308.57143,185.71428>,
> /* 5*/ <308.57143, 185.71428>, <308.57143, 262.85714>, 
> <308.57143,742.85714>,
> <308.57143,742.85714>,
> /* 6*/ <308.57143, 742.85714>, <308.57143, 742.85714>, 
> <317.14286,737.14285>,
> <308.57143,754.28571>,
> /* 7*/ <308.57143, 754.28571>, <300, 771.42857>, <288.57143,780>,
> <280,768.57143>,
> /* 8*/ <280, 768.57143>, <271.42857, 757.14285>, <294.28571,165.71428>,
> <277.14286,148.57143>,
> /* 9*/ <277.14286, 148.57143>, <260, 131.42857>, <231.42857,131.42857>,
> <217.14286,105.71428>,
> /* 10*/ <217.14286, 105.71428>, <202.85714, 80.000003>, 
> <205.71429,54.285713>,
> <185.71429,45.714283>,
> /* 11*/ <185.71429, 45.714283>, <165.71429, 37.142883>, 
> <2.8571429,2.8571826>,
> <0,2.8571826>
>
> sturm
> scale y*.8
> scale 1/1000
> interior { ior 1.5 }
> hollow
> }
>
> #macro tex( col )
> pigment { rgb col }
> normal { bumps .1 scale .002 }
> finish { ambient .01 diffuse .4 brilliance 1.2
> specular .97 roughness .02
> metallic .1
> reflection { .2,.9 metallic .1 fresnel on exponent 1 }
> conserve_energy
> }
> #end
>
> union {
> plane { y 0 pigment { rgb 1 } finish { ambient .2 diffuse .6 } }
> object { cup translate 0 tex( <.7,.8,1,.8,.1> ) }
> object { cup translate z*.7 tex( <.9,.86,.4,.8,.1> ) }
> object { cup translate z*(.7+1.3) tex( <1,.96,.84,.8,.1> ) }
> object { cup translate x*.7 tex(<1,1,1,.8,.1> ) }
> object { cup translate x*.7+z*.7 tex(<.96,1,.67,.8,.1> )}
> object { cup translate x*.7+z*.7*2 tex(<.7,1,.7,.8,.1> ) }
> object { cup translate -x*.7 tex(<1,.6,.6,.1,.8> ) }
> object { cup translate -x*.7+z*(.0+1.3) tex(<.5,.5,.8,.1,.8> ) }
> object { cup translate -x*.7*2+z*(-.7+1.3) tex(<.7,1,.94,.1,.8> ) }
> light_source { 1.6*(4-z*8) 1.2 }
>
> rotate -x*30
> translate z*2.6-y/3+x*.1
> }
>
> light_source { -z*8 .7 shadowless }
>
> camera { angle 55
> //aperture .04 blur_samples 60 confidence 1 focal_point y/3+z*2
> }
>

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nemesis nous apporta ses lumieres en ce 2008/01/27 20:20:
> so, any free time in your hands?  want to put that quad core to stress with
> povray 3.7beta?  If you're, try the little scene below.  With +AM2 +A0.04 +J1.0
> 1024X768 on a P4 2.66, it just brought my PC to a crawl for the whole weekend!
> It all began with a challenge in a brazilian forum, when some guy claimed this
> scene:
> http://200.213.105.41/greysilica/exemplos/cjcopojateado.png
> 
> took him 48 hours to render with Blender internal renderer.
> 
> Surely something was wrong, or so I thought.  Well, in the region between the
> bottom of second row cups and the top of first row cups, render time was about
> 11 minutes a line!  It is all about refractions, normals and fresnel
> reflections.  40 hours total on a P4 2.66 with povray 3.6.1...
> 
> I'm sure it's possible to optimize it with some no_image, no_shadow trickery
> with doubles and no_reflection in the main cups, but I didn't thought of it
> beforehand!
>
Just rendered here with 3.7.
LOT faster with +am2 +a0.3 at 1360*1024 AMD Athlon TBird 1400MHz.
Added adc_bailout 0.013.
Render time: 1:48:15.
Only thing, your glasses look much darker.

-- 
Alain
-------------------------------------------------
Documentation; The worst part of programming.

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Ric### [at] stjgovbr nous apporta ses lumieres en ce 2008/01/28 11:06:
> 
>  > You have multiple reflections and refractions. That mean that you 
> have tons of
>  > rays to compute. Add the aa and the small bumps, you need lot of 
> subsampling =
>  > lot of time.
> 
> yes, but looking at the original scene for the first time, I'd never 
> have guessed it!
> 
> but you're right, there are rays passing through 3 cups with IOR and 
> normals, as well
> as reflecting off the other cups in the scene.  It's insanity squared!
> 
>  > Try adding adc_bailout 0.01 in the global_settings.
> 
> I'll try that.  As well as some no_image, no_shadow trickery...
> 
>  > It will cause a small decrease in quality that can go unnoticed, but 
> will
>  > accelerate things as the ray tracing will often stop much earlier.
> 
> And I didn't even go with media for blurry shadows, area_lights, 
> radiosity and caustics!  
> I wonder how much time it'd take in an unbiased renderer such as Indigo 
> or Luxrender...
Try replacing the pigment with fade_color and fade_distance. That kind of 
glasses are not coloured on the surface but in the mass.

-- 
Alain
-------------------------------------------------
For THIS I bought a computer?

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