POV-Ray : Newsgroups : povray.newusers : Transparent background : Re: Transparent background Server Time
23 Jun 2021 15:11:32 EDT (-0400)
  Re: Transparent background  
From: William
Date: 13 Sep 2019 18:30:01
Message: <web.5d7c1780330653d59fc45d470@news.povray.org>
"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


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