Hello all,
I am a newbie in POV-ray and I am trying to generate a image with transparent
background.

I used:
background{colour rgbt <0.0, 0.0, 0.0>}

and I got a black background. Can anybody please provide your support to get a
black background?

Thanks.

William

Post a reply to this message

On 9/13/19 4:17 PM, William wrote:
> Hello all,
> I am a newbie in POV-ray and I am trying to generate a image with transparent
> background.
> 
> I used:
> background{colour rgbt <0.0, 0.0, 0.0>}
> 
> and I got a black background. Can anybody please provide your support to get a
> black background?
> 
> Thanks.
> 
> William
> 

Taking you not to be asking exactly what you asked, try:

background { colour rgbt <0,0,0,1> }

Your three values get promoted to 4 and the 't' values becomes 0 - or no 
transparency. Remember to use +ua and the default png type output(1).

Bill P.

(1) I think openexr is the other which supports the transparency, but I 
don't much use the feature myself so maybe not... Most image formats 
don't support it.

Post a reply to this message

William F Pokorny <ano### [at] anonymousorg> wrote:
> On 9/13/19 4:17 PM, William wrote:
> > Hello all,
> > I am a newbie in POV-ray and I am trying to generate a image with transparent
> > background.
> >
> > I used:
> > background{colour rgbt <0.0, 0.0, 0.0>}
> >
> > and I got a black background. Can anybody please provide your support to get a
> > black background?
> >
> > Thanks.
> >
> > William
> >
>
> Taking you not to be asking exactly what you asked, try:
>
> background { colour rgbt <0,0,0,1> }
>
> Your three values get promoted to 4 and the 't' values becomes 0 - or no
> transparency. Remember to use +ua and the default png type output(1).
>
> Bill P.
>
> (1) I think openexr is the other which supports the transparency, but I
> don't much use the feature myself so maybe not... Most image formats
> don't support it.


Hi Bill,

Thank you for your reply. My initial settings are like this below:
#include "colors.inc"
background {color rgbt <0, 0, 0, 1> }

#declare MainColor = rgb<1.0,0.0,0.0>;;
  camera {
    angle 45
    location <150.92993637586693,30.07787677021389,97.7056826656392>
    look_at <25,25,25>
  }
  light_source { <101.28273227706191,100.10083875733939,98.7618381976087> color
White shadowless}


I don't know how to intiate the UA setting. Can you please elaborate this?

William

Post a reply to this message

"William" <wil### [at] gmailcom> wrote:
> William F Pokorny <ano### [at] anonymousorg> wrote:
> > On 9/13/19 4:17 PM, William wrote:
> > > Hello all,
> > > I am a newbie in POV-ray and I am trying to generate a image with transparent
> > > background.
> > >
> > > I used:
> > > background{colour rgbt <0.0, 0.0, 0.0>}
> > >
> > > and I got a black background. Can anybody please provide your support to get a
> > > black background?
> > >
> > > Thanks.
> > >
> > > William
> > >
> >
> > Taking you not to be asking exactly what you asked, try:
> >
> > background { colour rgbt <0,0,0,1> }
> >
> > Your three values get promoted to 4 and the 't' values becomes 0 - or no
> > transparency. Remember to use +ua and the default png type output(1).
> >
> > Bill P.
> >
> > (1) I think openexr is the other which supports the transparency, but I
> > don't much use the feature myself so maybe not... Most image formats
> > don't support it.
>
>
> Hi Bill,
>
> Thank you for your reply. My initial settings are like this below:
> #include "colors.inc"
> background {color rgbt <0, 0, 0, 1> }
>
> #declare MainColor = rgb<1.0,0.0,0.0>;;
>   camera {
>     angle 45
>     location <150.92993637586693,30.07787677021389,97.7056826656392>
>     look_at <25,25,25>
>   }
>   light_source { <101.28273227706191,100.10083875733939,98.7618381976087> color
> White shadowless}
>
>
> I don't know how to intiate the UA setting. Can you please elaborate this?
>
> William



Got it.. I added these two lines in the .ini file. Then it worked well.

Output_File_Type=N
Output_Alpha=on

Best, William

Post a reply to this message

Le 2019-09-13 à 18:26, William a écrit :
> "William" <wil### [at] gmailcom> wrote:
>> William F Pokorny <ano### [at] anonymousorg> wrote:
>>> On 9/13/19 4:17 PM, William wrote:
>>>> Hello all,
>>>> I am a newbie in POV-ray and I am trying to generate a image with transparent
>>>> background.
>>>>
>>>> I used:
>>>> background{colour rgbt <0.0, 0.0, 0.0>}
>>>>
>>>> and I got a black background. Can anybody please provide your support to get a
>>>> black background?
>>>>
>>>> Thanks.
>>>>
>>>> William
>>>>
>>>
>>> Taking you not to be asking exactly what you asked, try:
>>>
>>> background { colour rgbt <0,0,0,1> }
>>>
>>> Your three values get promoted to 4 and the 't' values becomes 0 - or no
>>> transparency. Remember to use +ua and the default png type output(1).
>>>
>>> Bill P.
>>>
>>> (1) I think openexr is the other which supports the transparency, but I
>>> don't much use the feature myself so maybe not... Most image formats
>>> don't support it.
>>
>>
>> Hi Bill,
>>
>> Thank you for your reply. My initial settings are like this below:
>> #include "colors.inc"
>> background {color rgbt <0, 0, 0, 1> }
>>
>> #declare MainColor = rgb<1.0,0.0,0.0>;;
>>    camera {
>>      angle 45
>>      location <150.92993637586693,30.07787677021389,97.7056826656392>
>>      look_at <25,25,25>
>>    }
>>    light_source { <101.28273227706191,100.10083875733939,98.7618381976087> color
>> White shadowless}
>>
>>
>> I don't know how to intiate the UA setting. Can you please elaborate this?
>>
>> William
> 
> 
> 
> Got it.. I added these two lines in the .ini file. Then it worked well.
> 
> Output_File_Type=N
> Output_Alpha=on
> 
> Best, William
> 
> 
You can add «+ua» on the command line. In the Windows version, it's the 
box just right of the resolution drop list.

Alain

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