Hi,

This is my first post in this newsgroup, although
i have been reading all messages for some time
and have learn a lot about Pov-Ray.

Please take a look at this file:
http://aulasdigitales.net/universidad_isa_crystal.zip

This compressed file contains a small render and
a Pov-Ray scene.

In fact, this my Nth version of this scene, but after so
many trials, i am still unable to produce a lighting
effect that shows clearly the crystal letters over a
white (or light colored) background.

Every advice (and a small render that shows the results)
is more than welcome.

Thanks in advance.

alejandro

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capellan wrote:

> In fact, this my Nth version of this scene, but after so
> many trials, i am still unable to produce a lighting
> effect that shows clearly the crystal letters over a
> white (or light colored) background.

As a first improvement, increasing max_trace_level will help.

Try this:

global_settings { ambient_light color rgb <1, 1, 1> max_trace_level 50}

Unfortunately, it will take a lot longer to render ;)

Also, I think your U and N overlaps.

Note that there is also a "text" primitive in POV-Ray.

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Christian Froeschlin <chr### [at] chrfrde> wrote:

> As a first improvement, increasing max_trace_level will help.
>
> Try this:
>
> global_settings { ambient_light color rgb <1, 1, 1> max_trace_level 50}

Yes, this made brighter the crystal letters!

Now i changed the plane texture to Glass, and
finally can see a clear background, but just
as expected, there is no reflection in the
glass letters, so they are barely visible.

Tomorrow, will keep experimenting with other
glass textures and their parameters.

> Also, I think your U and N overlaps.
> Note that there is also a "text" primitive in POV-Ray.

i received this pov file from a friend, it's exported from Rhino 3D.
When i contact him, i will ask how to fix this.

Christian, many thanks again for your guidance!

alejandro

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capellan nous illumina en ce 2009-04-23 16:59 -->
> Hi,
> 
> This is my first post in this newsgroup, although
> i have been reading all messages for some time
> and have learn a lot about Pov-Ray.
> 
> Please take a look at this file:
> http://aulasdigitales.net/universidad_isa_crystal.zip
> 
> This compressed file contains a small render and
> a Pov-Ray scene.
> 
> In fact, this my Nth version of this scene, but after so
> many trials, i am still unable to produce a lighting
> effect that shows clearly the crystal letters over a
> white (or light colored) background.
> 
> Every advice (and a small render that shows the results)
> is more than welcome.
> 
> Thanks in advance.
> 
> alejandro
> 
> 
The light_source definition is not complete and it's located inside your text. 
As it is now, it's located at 1,1,1 and don't have an intensity. After the 
<1,1,1>, add "rgb 1" so that it will light up the scene. Now, you only have 
ambient lighting and the bakground to make your letets show.
Each leter is given it'sown material, each defined for that leter. It would be 
beter to put them in an union and apply one material to the union as a whole.

You could use the text primitive, at leadt for the "Universidad" word. It can 
create a object from almost any text using any available font. Sample:
text{ttf"times.ttf""Universidad",0.5,0 scale 10
material { //taken from your scene
texture {
         pigment { color Col_Glass_Clear }
         finish { F_Glass6 }
       }
       interior {
         I_Glass_Exp(2)
         fade_color color Col_Glass_Clear
dispersion 1.1 // added for completeness
       }
     }    //added for the example
photons{target refraction on reflection on collect off}
}

The photons block don't have any effect unless you add a photons block in the 
global_settings.

-- 
Alain
-------------------------------------------------
Keep your eyes wide open before marriage, half shut afterwards.
Benjamin Franklin

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"capellan" <cap### [at] gmailcom> wrote:

> Now i changed the plane texture to Glass, and
> finally can see a clear background, but just
> as expected, there is no reflection in the
> glass letters, so they are barely visible.
>

I think that is probably because there is nothing much in the scene *to*
reflect, except for the black background or sky_sphere.

Try adding a colorful sky_sphere, or some other colorful objects above the
lettering; the lettering should reflect very nicely as a result.

Ken W.

Post a reply to this message

"capellan" <cap### [at] gmailcom> wrote:
> Hi,
>
> This is my first post in this newsgroup, although
> i have been reading all messages for some time
> and have learn a lot about Pov-Ray.
>
> Please take a look at this file:
> http://www.chromeautoemblems.com/index.php/cPath/20
>
> This compressed file contains a small render and
> a Pov-Ray scene.
>
> In fact, this my Nth version of this scene, but after so
> many trials, i am still unable to produce a lighting
> effect that shows clearly the crystal letters over a
> white (or light colored) background.
>
> Every advice (and a small render that shows the results)
> is more than welcome.
>
> Thanks in advance.
>
> alejandro

Post a reply to this message

"capellan" <cap### [at] gmailcom> wrote:
> Hi,
>
> This is my first post in this newsgroup, although
> i have been reading all messages for some time
> and have learn a lot about Pov-Ray.
>
> Please take a look at this file:
> http://aulasdigitales.net/universidad_isa_crystal.zip
>
> This compressed file contains a small render and
> a Pov-Ray scene.
>
> In fact, this my Nth version of this scene, but after so
> many trials, i am still unable to produce a lighting
> effect that shows clearly the crystal letters over a
> white (or light colored) background.
>
> Every advice (and a small render that shows the results)
> is more than welcome.
>
> Thanks in advance.
>
> alejandro

http://www.chromeautoemblems.com/index.php/cPath/20

Post a reply to this message