POV-Ray : Newsgroups : povray.unofficial.patches : Transparent image maps??? Server Time
2 Sep 2024 04:13:58 EDT (-0400)
  Transparent image maps??? (Message 1 to 4 of 4)  
From: Psychomek
Subject: Transparent image maps???
Date: 19 Jul 2000 05:42:27
Message: <397578C0.9F811481@home.com>
how do i do this in megapov i want to make something like film
negatives....  the ability to have it transperent say at 0.5 and then
shine a spotlight or cylendrical light through it to project the image
onto another surface.  only way i knew before was with gifs but with the
legal problems with those they are removed.... well i have tried with
TGA and PNG but neither seems to work can you please help me???


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From: Tom Melly
Subject: Re: Transparent image maps???
Date: 19 Jul 2000 06:09:53
Message: <39757e71$1@news.povray.org>
Hi psycho,

PNGs work - the main thing is to reduce them to 256 colours before using
them (I don't think you can get an pallette index number unless you do).

If you use PSP, you can find the index of a particular colour by pointing
the eye-dropper at the colour, which will return the index number underneath
the colour-picker pallette.

"Psychomek" <psy### [at] homecom> wrote in message
news:397578C0.9F811481@home.com...
> how do i do this in megapov i want to make something like film
> negatives....  the ability to have it transperent say at 0.5 and then
> shine a spotlight or cylendrical light through it to project the image
> onto another surface.  only way i knew before was with gifs but with the
> legal problems with those they are removed.... well i have tried with
> TGA and PNG but neither seems to work can you please help me???
>
>


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From: Psychomek
Subject: Re: Transparent image maps???
Date: 19 Jul 2000 12:13:43
Message: <3975D461.F0A68830@home.com>
Thank you!  it works....  now if they would fixit so that TGA or 24bit PNG would
work....

Tom Melly wrote:

> Hi psycho,
>
> PNGs work - the main thing is to reduce them to 256 colours before using
> them (I don't think you can get an pallette index number unless you do).
>
> If you use PSP, you can find the index of a particular colour by pointing
> the eye-dropper at the colour, which will return the index number underneath
> the colour-picker pallette.
>
> "Psychomek" <psy### [at] homecom> wrote in message
> news:397578C0.9F811481@home.com...
> > how do i do this in megapov i want to make something like film
> > negatives....  the ability to have it transperent say at 0.5 and then
> > shine a spotlight or cylendrical light through it to project the image
> > onto another surface.  only way i knew before was with gifs but with the
> > legal problems with those they are removed.... well i have tried with
> > TGA and PNG but neither seems to work can you please help me???
> >
> >


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From: Mark Wagner
Subject: Re: Transparent image maps???
Date: 20 Jul 2000 01:04:30
Message: <3976885e@news.povray.org>
Psychomek wrote in message <3975D461.F0A68830@home.com>...
>Thank you!  it works....  now if they would fixit so that TGA or 24bit PNG
would
>work....


I've done that.  If anyone wants to have the code to incorporate into their
unofficial patch, contact me.

Mark


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