Here I make some glass objects. If anybody can comment the image.
[P750, 30h,  photons, no FB]

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Download 'different2.jpg' (92 KB)

Preview of image 'different2.jpg'

Nice colors. Several suggestions:
1. If you're not already using it, try variable reflection.
2. A more detailed skysphere with nice clouds would
be good. Slime posted a link to some image-maps
recently in povray.general.
3. The Photons-Effect isn't that visible, so unless the
scene changes to something more dramatic (with
scattering fog or such), you might want to try and
drop it to see if it has that great an impact on the image.
4. Do you either use absorption or fade_power in
the interior of the glass-objects? That might give
them some more depth.
5. Scatter some more spheres around. You can see
them in the reflections, and it looks almost like the
only sphere present are those already visible.

Finally: why 30 hours?

-- 
Tim Nikias v2.0
Homepage: http://www.digitaltwilight.de/no_lights
Email: no_lights (@) digitaltwilight.de


> Here I make some glass objects. If anybody can comment the image.
> [P750, 30h,  photons, no FB]
>
>
>


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Tim Nikias v2.0 wrote:
>Nice colors. Several suggestions:
>1. If you're not already using it, try variable reflection.

I will try, i am still learning.

>2. A more detailed skysphere with nice clouds would
>be good. Slime posted a link to some image-maps
>recently in povray.general.

Yes, I was thinking about this, and downloaded some of them. But I still
don't
know how exactly to use sky_sphere with  image-maps properly.

>3. The Photons-Effect isn't that visible, so unless the
>scene changes to something more dramatic (with
>scattering fog or such), you might want to try and
>drop it to see if it has that great an impact on the image.

The photons create the caustics for each glass object. I have to limit the
total number of photons to speed up rendering. With no photons the rendering
time is an order of magnitude smaller.

>4. Do you either use absorption or fade_power in
>the interior of the glass-objects? That might give
>them some more depth.

No, i will try.

>5. Scatter some more spheres around. You can see
>them in the reflections, and it looks almost like the
>only sphere present are those already visible.
>
>Finally: why 30 hours?
>

The photons increase the rendering times. Probably if I play with parameters
it will speed up.

>Tim Nikias v2.0
>Homepage: http://www.digitaltwilight.de/no_lights
>Email: no_lights (@) digitaltwilight.de
>
>
>> Here I make some glass objects. If anybody can comment the image.
>> [P750, 30h,  photons, no FB]
>>
>>
>>
>
>
>---
>Outgoing mail is certified Virus Free.
>Checked by AVG anti-virus system (http://www://www.grisoft.com.
>Version: 6.0.515 / Virus Database: 313 - Release Date: 01.09.2003
>

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Opps,
In fact I am using most of the things your suggested.
I have jast looked at the glass definition.

M_Glass=    // Glass material
material {
  texture {
    pigment {rgbt 1}
    finish {
      ambient 0.0
      diffuse 0.05
      specular 0.6
      roughness 0.005
      reflection {
        0.1, 1.0
        fresnel on
      }
      conserve_energy
    }
  }
  interior {
    ior 1.5
    fade_power 1001
    fade_distance 0.9
    fade_color <0.5,0.8,0.6>
  }
}




Tim Nikias v2.0 wrote:
>Nice colors. Several suggestions:
>1. If you're not already using it, try variable reflection.
>2. A more detailed skysphere with nice clouds would
>be good. Slime posted a link to some image-maps
>recently in povray.general.
>3. The Photons-Effect isn't that visible, so unless the
>scene changes to something more dramatic (with
>scattering fog or such), you might want to try and
>drop it to see if it has that great an impact on the image.
>4. Do you either use absorption or fade_power in
>the interior of the glass-objects? That might give
>them some more depth.
>5. Scatter some more spheres around. You can see
>them in the reflections, and it looks almost like the
>only sphere present are those already visible.
>
>Finally: why 30 hours?
>
>Tim Nikias v2.0
>Homepage: http://www.digitaltwilight.de/no_lights
>Email: no_lights (@) digitaltwilight.de
>
>
>> Here I make some glass objects. If anybody can comment the image.
>> [P750, 30h,  photons, no FB]
>>
>>
>>
>
>
>---
>Outgoing mail is certified Virus Free.
>Checked by AVG anti-virus system (http://www://www.grisoft.com.
>Version: 6.0.515 / Virus Database: 313 - Release Date: 01.09.2003
>

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Perhaps you'd might want to play a little with
the settings for fade_power. It might also help
to play with the reflection-values, and using
falloff instead of fresnel. Its more artistic than
realistic, but this scene just calls for more
artistic handling!

Regarding the sky_sphere:
You have to use the image_map pigment to
map it onto the sphere, and if I'm not mistaken,
its map_type 2 for spherical (you might want to
look that one up though).
To grasp the idea of spherical mapping:
the entire line on the top of the image is actually
placed onto the very top-center of the sphere,
much like the north-pole is stretched out across
the entire image when looking at image-maps
for the earth.
The center horizontal line then wraps around the
equator of the sphere, and the bottom line once
again gets squished into the south pole.

Once you've made some larger adjustments, why
not post it again? Don't make too many posts of
miniscule adjustments though, just now and then
the big ones, and for specific questions.

Regards,
Tim

-- 
Tim Nikias v2.0
Homepage: http://www.digitaltwilight.de/no_lights
Email: no_lights (@) digitaltwilight.de


> Tim Nikias v2.0 wrote:
> >Nice colors. Several suggestions:
> >1. If you're not already using it, try variable reflection.
>
> I will try, i am still learning.
>
> >2. A more detailed skysphere with nice clouds would
> >be good. Slime posted a link to some image-maps
> >recently in povray.general.
>
> Yes, I was thinking about this, and downloaded some of them. But I still
> don't
> know how exactly to use sky_sphere with  image-maps properly.
>
> >3. The Photons-Effect isn't that visible, so unless the
> >scene changes to something more dramatic (with
> >scattering fog or such), you might want to try and
> >drop it to see if it has that great an impact on the image.
>
> The photons create the caustics for each glass object. I have to limit the
> total number of photons to speed up rendering. With no photons the
rendering
> time is an order of magnitude smaller.
>
> >4. Do you either use absorption or fade_power in
> >the interior of the glass-objects? That might give
> >them some more depth.
>
> No, i will try.
>
> >5. Scatter some more spheres around. You can see
> >them in the reflections, and it looks almost like the
> >only sphere present are those already visible.
> >
> >Finally: why 30 hours?
> >
>
> The photons increase the rendering times. Probably if I play with
parameters
> it will speed up.
>
> >Tim Nikias v2.0
> >Homepage: http://www.digitaltwilight.de/no_lights
> >Email: no_lights (@) digitaltwilight.de
> >
> >
> >> Here I make some glass objects. If anybody can comment the image.
> >> [P750, 30h,  photons, no FB]
> >>
> >>
> >>
> >
> >
> >---
> >Outgoing mail is certified Virus Free.
> >Checked by AVG anti-virus system (http://www://www.grisoft.com.
> >Version: 6.0.515 / Virus Database: 313 - Release Date: 01.09.2003
> >
>
>


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Thanks. I will play with the parameters, and post the img.

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