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Found 2 results

  1. Hello, I'm sorely missing the feature to export palettized PNG-8 with alpha from Affinity Designer for web development. I can export PNG-24 with alpha or PNG-8 with binary (on or off) transparency, but not PNG-8 using a palette in which the colors of the palette have alpha values attached. This is a feature that's supported by both the standalone tool ImageAlpha (converts PNG-24 to PNG-8 with alpha) and by Photoshop's Export dialog that you get by right-clicking layers. I'm using PNG-8 with alpha for image size optimization, especially for spritesheets and graphics that would not quite work as SVG. At the moment my workflow is: Export PNG-24, open each PNG in ImageAlpha, manually adjust the settings there, save. I have to repeat this in parts every time I change a graphic, cancelling the benefits continuous export would provide me with. Please add this feature Cheers -- Peter ImageAlpha is using "pngquant and pngnq-s9 and alpha-channel-aware posterizer." ImageAlpha: https://pngmini.com
  2. I'm running the Affinity Photo Trial and one of the things I need to switch to Affinity is exporting reasonably large PNG-8 files. I've run into a problem where with big PNG-8s, I am seeing what looks like small bits of corruption. It's most clearly seen with white background (I looked at some of the other posts and tried setting matte to both transparent and white), but I've also had weird pixel placement in other parts of colour images. Basically if you look below the gradient you can see a pattern of tiny dots spreading their way down in angled lines across half the page. The pattern varies when I do the export. My export settings are: Lanczos 3 (seperable), RGB 8-bit, Palettised, Automatic Palette, 256 Colours I've attached the PNG as well as the source file. affinitybug.afphoto
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