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How can I make a PNG with a full alpha channel?

Posted: 2003-11-05 06:05pm
by Einhander Sn0m4n
I want my new Spongebob av to have a full alpha channel like Durandal's Marathon symbol. Can anyone help me or find a good tutorial for me? :D

Posted: 2003-11-05 10:37pm
by Dalton
Save it as a 24-bit PNG over a transparent background...that should do it. Or you might be able to specify the matte color.

Posted: 2003-11-08 12:58am
by Pu-239
Done:
Image
http://www.geocities.com/jhnphm/usableavatar.png
Second link renamed for DLing convenience.

The problem is that gimp doesn't support changing palette when using alpha (w/o special plugin which I don't feel like packaging (I package everything installed systemwide)), meaning I had to switch the palette to 37 colors, switch it to 24 bit, cut out the background, and send it through pngcrush with the brute-force option testing all 115 methods of optimization to fit the avatar . Can you do better with Photoshop?

I shrunk it to about 97-98% for cosmetic purposes. Can't get rid of halo, would be too time consuming.

Posted: 2003-11-08 03:17am
by Einhander Sn0m4n
Danke Schoen, Plutonium! :D

EDIT: Anyone else who thinks Spongebob looks stoned in that pic raise your hand *raises both* :teeth:

Posted: 2003-11-10 01:03am
by Durandal
I hate Sponge Bob.