Hello

First, an apology. My English is not very good, but try to explain. I'm at
Pov-Ray to render,and made the model with Sketchup. I wonder if there is any
user working with this plug-in. I've done some work as a hobby, but I still need
much to learn. I use version 3.6 for export files, and finally rendered with the
latest beta version.

I would appreciate if someone could tell me some website where I could  find
information about materials, especially crystals, which is difficult to me to
understand.I visited many websites related to this program, but all are of
direct users, I mean, they do not export the model, and its hard to me to
understand how  to include materiales changes I need. The type of images that
I've done are architectural design.

    thanks for your time.



Greetings.

Post a reply to this message

> I would appreciate if someone could tell me some website where I could  find
> information about materials, especially crystals, which is difficult to me to
> understand

Do you wish to export materials from sketchup or do you wish
to know how to apply materials to the exported geometry from
sketchup? In the latter case, people can help without knowing
sketchup, just post a small sample how the exported code looks
like and what you wish to change.

Post a reply to this message

On 8/21/2010 10:06 PM, arq3design wrote:
>
> Hello
>
> First, an apology. My English is not very good, but try to explain. I'm at
> Pov-Ray to render,and made the model with Sketchup. I wonder if there is any
> user working with this plug-in. I've done some work as a hobby, but I still need
> much to learn. I use version 3.6 for export files, and finally rendered with the
> latest beta version.
>
> I would appreciate if someone could tell me some website where I could  find
> information about materials, especially crystals, which is difficult to me to
> understand.I visited many websites related to this program, but all are of
> direct users, I mean, they do not export the model, and its hard to me to
> understand how  to include materiales changes I need. The type of images that
> I've done are architectural design.
>
>      thanks for your time.
>
>
>
> Greetings.
>
>
>
>

I don't know if this will specifically answer your question, but perhaps 
it will point you in a useful direction.

I use SU2POV on some of my projects and you'll need to "hand edit" the 
.pov file that SU2POV plugin exports (saves) to get your material 
changes accomplished. SU2POV does not, at the present, allow much 
adjustment of textures directly from inside the plugin and many of the 
finish and texture parameters can only be done by hand editing.

Here's what I do:

1. Create the objects in SketchUp.
2. Attach some basic "place holder" textures to the objects. These 
textures will be saved in the .pov file in the next step.
3. Invoke the SU2POV plugin and save the file.
4. Do a simple test render to make sure that the scene is pretty much 
how I want it.
5. Open the .pov file in either a text editor or the IDE (Windows only) 
and hand edit the "place holder" textures to get the results you want. 
You can change practically all the parameters for textures, color, 
finishes, etc. by hand.
5. Set up final rendering, etc.

As for learning about materials, etc in POVray, about the only thing I 
can suggest is to read the POVray documentation, most of what you'll 
need to know it there. There are a number of .inc in the POVray install 
directory that you can study or use to create your textures.

I'm afraid I can't help you much with your "crystal" question other than 
to advise you to continue searching the 'net.

Cheers.

Post a reply to this message

>
> Hello
>
> First, an apology. My English is not very good, but try to explain. I'm at
> Pov-Ray to render,and made the model with Sketchup. I wonder if there is any
> user working with this plug-in. I've done some work as a hobby, but I still need
> much to learn. I use version 3.6 for export files, and finally rendered with the
> latest beta version.
>
> I would appreciate if someone could tell me some website where I could  find
> information about materials, especially crystals, which is difficult to me to
> understand.I visited many websites related to this program, but all are of
> direct users, I mean, they do not export the model, and its hard to me to
> understand how  to include materiales changes I need. The type of images that
> I've done are architectural design.
>
>      thanks for your time.
>
>
>
> Greetings.
>
>
>
>

When you mention "crystals", are you thinking of tranparent materials, 
or geometric shapes like those the crystals can grow into?

Anyway, for the first case, and many examples of the second, you need 
mostly transparent pigments, some reflection, an index of refraction and 
some colour fading.
I can give you a sample of what it can look like:

material{

pigment{rgbt 0.97} // mostly transparent

finish{diffuse 0.1 ambient 0 specular 0.7 roughness 0.001 
reflection{0.1, 0.99 fresnel} conserve_energy}
// add some highlights and variable reflection
// fresnel usualy make reflection look more natural

interior{ior 1.9
// turn on refraction and can cause total internal reflection
dispersion 1.01 dispersion_samples 10
// causes chromatic dispersion to occurs
fade_color<1,1,0> fade_distance 1 fade_power 1001
// colours the interior of the object. The exact tint
// depends on the length of the trajectory inside the object
// and the fade_distance.
}

}

For this to show the best result, you need some environment and possibly 
a few light_source.



Alain

Post a reply to this message

Christian Froeschlin <chr### [at] chrfrde> wrote:
> > I would appreciate if someone could tell me some website where I could  find
> > information about materials, especially crystals, which is difficult to me to
> > understand
>
> Do you wish to export materials from sketchup or do you wish
> to know how to apply materials to the exported geometry from
> sketchup? In the latter case, people can help without knowing
> sketchup, just post a small sample how the exported code looks
> like and what you wish to change.






 Hello, Christian:

    I wish to know hoy to change material properties  to the exported geometry
from Sketchup, specifically glass material. I can't get a realistic temperate
glass ( for a dining table). I've tried with all the F_Glass types, and the
glass still not look as well as I wanted, it looks more like a dark mirror.

This is the material :


#declare Cristal_Mesa = texture {

    pigment { color rgbf <0.05,0.05,0.05,0.40>}

    finish { F_Glass5 }




I wish to  know how to work the Glass_Interior.


                  Thanks a lot for your time.

Post a reply to this message

J R Houck <jho### [at] northrimnet> wrote:
> On 8/21/2010 10:06 PM, arq3design wrote:
> >
> > Hello
> >
> > First, an apology. My English is not very good, but try to explain. I'm at
> > Pov-Ray to render,and made the model with Sketchup. I wonder if there is any
> > user working with this plug-in. I've done some work as a hobby, but I still need
> > much to learn. I use version 3.6 for export files, and finally rendered with the
> > latest beta version.
> >
> > I would appreciate if someone could tell me some website where I could  find
> > information about materials, especially crystals, which is difficult to me to
> > understand.I visited many websites related to this program, but all are of
> > direct users, I mean, they do not export the model, and its hard to me to
> > understand how  to include materiales changes I need. The type of images that
> > I've done are architectural design.
> >
> >      thanks for your time.
> >
> >
> >
> > Greetings.
> >
> >
> >
> >
>
> I don't know if this will specifically answer your question, but perhaps
> it will point you in a useful direction.
>
> I use SU2POV on some of my projects and you'll need to "hand edit" the
> .pov file that SU2POV plugin exports (saves) to get your material
> changes accomplished. SU2POV does not, at the present, allow much
> adjustment of textures directly from inside the plugin and many of the
> finish and texture parameters can only be done by hand editing.
>
> Here's what I do:
>
> 1. Create the objects in SketchUp.
> 2. Attach some basic "place holder" textures to the objects. These
> textures will be saved in the .pov file in the next step.
> 3. Invoke the SU2POV plugin and save the file.
> 4. Do a simple test render to make sure that the scene is pretty much
> how I want it.
> 5. Open the .pov file in either a text editor or the IDE (Windows only)
> and hand edit the "place holder" textures to get the results you want.
> You can change practically all the parameters for textures, color,
> finishes, etc. by hand.
> 5. Set up final rendering, etc.
>
> As for learning about materials, etc in POVray, about the only thing I
> can suggest is to read the POVray documentation, most of what you'll
> need to know it there. There are a number of .inc in the POVray install
> directory that you can study or use to create your textures.
>
> I'm afraid I can't help you much with your "crystal" question other than
> to advise you to continue searching the 'net.
>
> Cheers.


 Hello JR:

      Thanks for you time. I'm already know hoy to make materials changes in the
POV-RAY  file,basic changes, but when I'm tried to adjust glass, I just don't
get what I wanted, and unfortunately there is not much Spanish pages where to
learn. But the good one is that recently, the SU2POV plug in have a new release
that include more predetermined materials. I will see what I can get with this
new plug in.

     Have a nice day.

Post a reply to this message

Alain <aze### [at] qwertyorg> wrote:

> >
> > Hello
> >
> > First, an apology. My English is not very good, but try to explain. I'm at
> > Pov-Ray to render,and made the model with Sketchup. I wonder if there is any
> > user working with this plug-in. I've done some work as a hobby, but I still need
> > much to learn. I use version 3.6 for export files, and finally rendered with the
> > latest beta version.
> >
> > I would appreciate if someone could tell me some website where I could  find
> > information about materials, especially crystals, which is difficult to me to
> > understand.I visited many websites related to this program, but all are of
> > direct users, I mean, they do not export the model, and its hard to me to
> > understand how  to include materiales changes I need. The type of images that
> > I've done are architectural design.
> >
> >      thanks for your time.
> >
> >
> >
> > Greetings.
> >
> >
> >
> >
>
> When you mention "crystals", are you thinking of tranparent materials,
> or geometric shapes like those the crystals can grow into?
>
> Anyway, for the first case, and many examples of the second, you need
> mostly transparent pigments, some reflection, an index of refraction and
> some colour fading.
> I can give you a sample of what it can look like:
>
> material{
>
> pigment{rgbt 0.97} // mostly transparent
>
> finish{diffuse 0.1 ambient 0 specular 0.7 roughness 0.001
> reflection{0.1, 0.99 fresnel} conserve_energy}
> // add some highlights and variable reflection
> // fresnel usualy make reflection look more natural
>
> interior{ior 1.9
> // turn on refraction and can cause total internal reflection
> dispersion 1.01 dispersion_samples 10
> // causes chromatic dispersion to occurs
> fade_color<1,1,0> fade_distance 1 fade_power 1001
> // colours the interior of the object. The exact tint
> // depends on the length of the trajectory inside the object
> // and the fade_distance.
> }
>
> }
>
> For this to show the best result, you need some environment and possibly
> a few light_source.
>
>
>
> Alain




    Hello Alain:

      First of all thanks. I mean "Glasses", specific, architectural or
furniture glasses.


As I said to Christian and JR, I want to get a good material for a tempered
glass dining table. I tested with different types of F_Glass, and do not get the
result I want. I tried to include the variation of Interior glass, but can not
get to run the file.

This is an example of how the material I have currently, is the closest thing
I've gotten what I need, but are, for my taste, too much reflection. Could you
give me some advice?.




#declare Cristal_Mesa = texture {

    pigment { color rgbf <0.05,0.05,0.05,0.40>}

    finish { F_Glass5 }

}


Thank you again.

Good Day

Post a reply to this message

arq3design wrote:

> This is an example of how the material I have currently, is the closest thing
> I've gotten what I need, but are, for my taste, too much reflection. Could you
> give me some advice?.

Below is your texture extended into a material so you
can add a interior, and the F_Glass5 expanded into the
values from glass.inc so you can play with the parameters.
To reduce the reflection you can decrease specular as
well as the min/max value in the reflection block.

#declare Cristal_Mesa = material
{
   texture
   {
     pigment { color rgbt 1}

     finish
     {
       specular 0.7
       roughness 0.001
       ambient 0
       diffuse 0
       reflection
       {
         0.2, 1.0
         fresnel on
       }
       conserve_energy
    }
  }
  interior {ior 1.5}
}

// sample usage
sphere {0,1 material {Cristal_Mesa}}

Post a reply to this message

> arq3design wrote:
>
>> This is an example of how the material I have currently, is the
>> closest thing
>> I've gotten what I need, but are, for my taste, too much reflection.
>> Could you
>> give me some advice?.
>
> Below is your texture extended into a material so you
> can add a interior, and the F_Glass5 expanded into the
> values from glass.inc so you can play with the parameters.
> To reduce the reflection you can decrease specular as
> well as the min/max value in the reflection block.
>
> #declare Cristal_Mesa = material
> {
> texture
> {
> pigment { color rgbt 1}
>
> finish
> {
> specular 0.7
Reduce this if the highlights are to importent.
> roughness 0.001
If you reduce this value, the highlights will get sharper.
> ambient 0
> diffuse 0
> reflection
> {
> 0.2, 1.0
Adjust the first value to set the minimal reflective value. That valus 
is used when the surface is viewed perpendicularly.
Adjust the second value to set the maximal reflective value. That value 
is used when the surface is vewed at a grazing angle.
> fresnel on
You can add an optional "exponent Float" here. It will affect the 
falloff of the reflection.
> }
> conserve_energy
Important. Keep that.
> }
> }
> interior {ior 1.5}
If you change the interior, the reflection will change as the fresnel 
reflection is ior dependent.
> }
>
> // sample usage
> sphere {0,1 material {Cristal_Mesa}}
>

You can try with: reflection{0.05, 0.7 fresnel}

This will gives you a notably less reflective glass.



Alain

Post a reply to this message