8 Replies Latest reply on Aug 10, 2011 5:45 PM by CreativeDC

    PNG 8 Alpha Transparency Palette Errors


      I am attempting to export a PNG 8 image with alpha transparency using Fireworks on Windows 7 64-bit. When I attempt to optimize the image to PNG 8, Adaptive with Alpha Transparency and rebuild the palette it crushed the palette down. The image is a grayscale image and the bug appears similiar to the one reported here http://blogs.adobe.com/sarthak/2010/09/png-8-export-color-palette-issues.html.


      Here is a screen cast of someone doing what I want to do, http://brenelz.com/blog/png-8-alpha-transparency-screencast/ (fast forward through the parts of him editing HTML).


      This is an example of what I am trying to do, an PNG 8 with alpha transparency (view full image);



      This is what I get when I open and then export the sample image out of Fireworks;


      It crushes the palette.


      This is the optimize panel when the original file is first opened:


      This is what happens when the palette is rebuilt, which matched the exported palette;