POV-Ray : Newsgroups : povray.beta-test : (beta 2) bitmap alpha channel, scale and no_image Server Time
26 Feb 2024 16:53:55 EST (-0500)
  (beta 2) bitmap alpha channel, scale and no_image (Message 1 to 3 of 3)  
From: Carbonaut
Subject: (beta 2) bitmap alpha channel, scale and no_image
Date: 18 Apr 2005 15:00:01
Message: <web.426402d627a031d914107e060@news.povray.org>
32 bit tga and png alpha channel is mixed through out the image. White 3x3
image with top left pixel masked out produces:

 ---     X is masked
|XXX|
|X X|
|XX |
 ---

Also scale and no_image have no effect. Full scene:

plane{z, 1
  pigment{image_map{tga "alpha.tga" once}}
  finish{ambient 1}
  translate<-0.5, -0.5, 0>
  scale 10        // no effect
  no_image        // no effect
}


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From: Slime
Subject: Re: (beta 2) bitmap alpha channel, scale and no_image
Date: 25 Apr 2005 17:03:26
Message: <426d5b1e$1@news.povray.org>
> Also scale and no_image have no effect.

I can confirm that no_image (and also no_reflection, but not no_shadow) have
no effect, but scaling works for me in my own test cases, and even in the
scene you provided. Maybe it's only the image_map which won't scale
properly?

 - Slime
 [ http://www.slimeland.com/ ]


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From: Chris Cason
Subject: Re: (beta 2) bitmap alpha channel, scale and no_image
Date: 28 Apr 2005 00:17:32
Message: <427063dc@news.povray.org>
Carbonaut wrote:
> 32 bit tga and png alpha channel is mixed through out the image. White 3x3
> image with top left pixel masked out produces:

This has been fixed.

> Also scale and no_image have no effect.

no_image has been fixed. I can't find a problem with scale.

thanks for the report.

-- Chris


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