POV-Ray : Newsgroups : povray.newusers : image_map for png, tga, bmp Server Time
13 Nov 2024 22:25:13 EST (-0500)
  image_map for png, tga, bmp (Message 1 to 4 of 4)  
From: Jerome Waters
Subject: image_map for png, tga, bmp
Date: 6 Dec 1999 16:51:56
Message: <384D11AD.EAD5358@mscsoftware.com>
For the "gif" format, the image_map feature "transmit/filter all 1.0"
seems to work as expected.  But for "png", "tga", and "bmp" formats such
is not the case.  Is there a bug in the "transmit/filter" feature for
"png", "tga", and "bmp" or is there something I'm missing.

I'd really prefer to use a format other than "gif" that supports a
greater number of colors.

- Jerome


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From: Ken
Subject: Re: image_map for png, tga, bmp
Date: 6 Dec 1999 18:54:31
Message: <384C4A13.33C3D6D5@pacbell.net>
Jerome Waters wrote:
> 
> For the "gif" format, the image_map feature "transmit/filter all 1.0"
> seems to work as expected.  But for "png", "tga", and "bmp" formats such
> is not the case.  Is there a bug in the "transmit/filter" feature for
> "png", "tga", and "bmp" or is there something I'm missing.
> 
> I'd really prefer to use a format other than "gif" that supports a
> greater number of colors.
> 
> - Jerome

It is not a bug. The filter and transmit all only works on images that have
an 8 bit 256 color palette. I think you can save your .bmp, tga or whatever
in 8 bit 256 colors and use those image formats but you lose the color depth
you are looking for.

-- 
Ken Tyler -  1200+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/


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From: Jerome Waters
Subject: Re: image_map for png, tga, bmp
Date: 6 Dec 1999 19:01:17
Message: <384D2FFF.F2B261C7@mscsoftware.com>
Ken wrote:
> 
> It is not a bug. The filter and transmit all only works on images that have
> an 8 bit 256 color palette. I think you can save your .bmp, tga or whatever
> in 8 bit 256 colors and use those image formats but you lose the color depth
> you are looking for.
> 

Oh well, thanks Ken.

- Jerome


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From: Josh English
Subject: Re: image_map for png, tga, bmp
Date: 7 Dec 1999 15:04:46
Message: <384D685D.502FA219@spiritone.com>
.png files can use an alpha channel as well, so you can control the
transparency with a graphic editor that doesn't relate to the main image.

Jerome Waters wrote:

> For the "gif" format, the image_map feature "transmit/filter all 1.0"
> seems to work as expected.  But for "png", "tga", and "bmp" formats such
> is not the case.  Is there a bug in the "transmit/filter" feature for
> "png", "tga", and "bmp" or is there something I'm missing.
>
> I'd really prefer to use a format other than "gif" that supports a
> greater number of colors.
>
> - Jerome

--

Josh English
eng### [at] spiritonecom
ICQ: 1946299
"Stress is when you wake up screaming and realize you haven't fallen asleep
yet."


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