Re: Transparent GIFS

John Norton (nortonj@nexus.mwsu.edu)
Wed, 31 May 1995 07:43:06 -1000


Message-Id: <9505311240.AA01618@nexus.mwsu.EDU>
Date: Wed, 31 May 1995 07:43:06 -1000
To: www-html@www10.w3.org
From: nortonj@nexus.mwsu.edu (John Norton)
Subject: RE:  Transparent GIFS

>>>Hello.  I have a question about using transparent gif's with netscape's
>>>backgrounds.  How come these gif's aren't transparent?  If I don't use a
>>>background on the page, the gif is transpaernt.  But if I do use a
>>>background, there seems to be a black hue around the image.  Any ideas?
>>
>>Lisajoy,
>>
>>If you want a transparent gif on a page containing a background, make sure
>>the transparent gif is NOT interlaced. :)


>I beg to politely differ. I'm not sure what your reasons are for saying this
>but I would like to point you to several of my pages where I do exactly what
>you warn against with (as far as I can tell) success. I haven't noticed any
>problems with interlacing transparent GIFs shown against a background -
>either colored of GIF or both.

>http://nctweb.com/nct/

>and also

>http://nctweb.com/nct/eleclead.html

>Please educate me if I am missing something here |-(:-)


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I Think the question to ask is whether or not you are making the background 
of the GIF truly transparent or are you doing a palette entry and matching 
the background color with that of the background of your browser.
John Norton
Health Sciences Division Lab Coordinator
Midwestern State University
nortonj@nexus.mwsu.edu