I only have a single sphere to which I applied the Glass texture and it just
appears as black. I've followed other "transparent object" tutorials and
they appeared as black too. I've tried raising max_trace_level but that
didn't help.

/////////////////////////////
#include "colors.inc"
#include "textures.inc"

light_source {
  <0, 25, 5>
  color White
}


camera {
  location <0, 0,-2>
  look_at  <0, 0, 0>
}

global_settings {
  ambient_light
//  max_trace_level 100
}

background {
  Gray80
}

sphere {
  0, 0.5
  texture {
    Glass
  }
}
//////////////////////
In case it's useful, I'm using Version 3.6 on WinXP SP2.

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"robart" <rob### [at] tpgcomau> wrote:
> I only have a single sphere to which I applied the Glass texture and it just
> appears as black. I've followed other "transparent object" tutorials and
> they appeared as black too. I've tried raising max_trace_level but that
> didn't help.
>
What you need is something else in your scene. So you can see the
transparency of the sphere. for example add a sky sphere.

sky_sphere {
  pigment {
    gradient y
    color_map { [0.0 color rgb <0.7,0.7,1.0>] [1.0 color blue 0.5] }
  }
}


Stephen

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its normal ...the texture Glass is a bit dark and transparency is at 0.7...
On main scene it will be a little dark
The Glass2 is more transparent that the Glass texture
Glass3 is Crystal like ..





news:web.452a2519bf591dffeddc22b50@news.povray.org...
> I only have a single sphere to which I applied the Glass texture and it
just
> appears as black. I've followed other "transparent object" tutorials and
> they appeared as black too. I've tried raising max_trace_level but that
> didn't help.
>
> /////////////////////////////
> #include "colors.inc"
> #include "textures.inc"
>
> light_source {
>   <0, 25, 5>
>   color White
> }
>
>
> camera {
>   location <0, 0,-2>
>   look_at  <0, 0, 0>
> }
>
> global_settings {
>   ambient_light
> //  max_trace_level 100
> }
>
> background {
>   Gray80
> }
>
> sphere {
>   0, 0.5
>   texture {
>     Glass
>   }
> }
> //////////////////////
> In case it's useful, I'm using Version 3.6 on WinXP SP2.
>
>

Post a reply to this message

robart wrote:

>I only have a single sphere to which I applied the Glass texture and it just
>appears as black. I've followed other "transparent object" tutorials and
>they appeared as black too. I've tried raising max_trace_level but that
>didn't help.
>
>/////////////////////////////
>#include "colors.inc"
>#include "textures.inc"
>
>light_source {
>  <0, 25, 5>
>  color White
>}
>
>
>camera {
>  location <0, 0,-2>
>  look_at  <0, 0, 0>
>}
>
>global_settings {
>  ambient_light
>//  max_trace_level 100
>}
>
>background {
>  Gray80
>}
>
>sphere {
>  0, 0.5
>  texture {
>    Glass
>  }
>}
>//////////////////////
>In case it's useful, I'm using Version 3.6 on WinXP SP2.
>
>
>  
>
This is off-topic for your question, but I notice that you have 
"ambient_light" without any color value in your global_settings.  Were 
you perhaps trying to adjust the overall brightness of your scene?  If 
that's the case, you might need to use "assumed_gamma" instead.  (On my 
PC, for example, scenes tend to come out much too dark unless I use 
"assumed_gamma 1.0" or thereabouts.)

Hope this is of some use!

--Sherry Shaw

-- 
#macro T(E,N)sphere{x,.4rotate z*E*60translate y*N pigment{wrinkles scale
.3}finish{ambient 1}}#end#local I=0;#while(I<5)T(I,1)T(1-I,-1)#local I=I+
1;#end camera{location-5*z}plane{z,37 pigment{granite color_map{[.7rgb 0]
[1rgb 1]}}finish{ambient 2}}//                                   TenMoons

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robart nous apporta ses lumieres en ce 09/10/2006 06:35:
> I only have a single sphere to which I applied the Glass texture and it just
> appears as black. I've followed other "transparent object" tutorials and
> they appeared as black too. I've tried raising max_trace_level but that
> didn't help.
> 
> /////////////////////////////
> #include "colors.inc"
> #include "textures.inc"
> 
> light_source {
>   <0, 25, 5>
>   color White
> }
> 
> 
> camera {
>   location <0, 0,-2>
>   look_at  <0, 0, 0>
> }
> 
> global_settings {
>   ambient_light
> //  max_trace_level 100
> }
> 
> background {
>   Gray80
> }
> 
> sphere {
>   0, 0.5
>   texture {
>     Glass
>   }
> }
> //////////////////////
> In case it's useful, I'm using Version 3.6 on WinXP SP2.
> 
> 
Do you have changed the quality setting? Set that to low and transparency are 
ignored and tend to render dark or black.
ambient_light in global_settings is used to change the overall tint of the 
ambient part of the finish, usualy beter not to use at all.

-- 
Alain
-------------------------------------------------
Don't cry because it is over, smile because it happened.

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Oh, I must have left ambient_light in there when I copied and pasted from
other scenes.

Alain was right. I checked my POVRAY.INI file and Quality=4, though I don't
ever remember setting it to that...

Thanks everyone for your help.

Post a reply to this message

robart nous apporta ses lumieres en ce 10/10/2006 02:17:
> Oh, I must have left ambient_light in there when I copied and pasted from
> other scenes.
> 
> Alain was right. I checked my POVRAY.INI file and Quality=4, though I don't
> ever remember setting it to that...
> 
> Thanks everyone for your help.
> 
> 
Maybe you used some other programm that set it to 4 for a test render, and it 
did'nt set it back after it finished.

-- 
Alain
-------------------------------------------------
To define recursion, we must first define recursion.

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