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POPNG with transparency from Photoshop to Flash: how to make .swf display exactly what .psd does?
 

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  1. POPNG with transparency from Photoshop to Flash: how to make .swf display exactly what .psd does?
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    <p>I have two layers in Photoshop: 1 -- a texture, 2 -- a semi-transparent image that overlaps texture. The combination of the two looks nice in Photoshop. I export them separately from Photoshop saving them as 24 bit PNG with transparency and colors converted to sRGB. (Working color space of PS is sRGB.) </p> <p>The result of importing them into flash makes me cry (see images below, note what areas around crosses look like). :( </p> <p>I tried both loading PNGs dynamically and directly importing them into fla (compression type: lossles, allow smoothing: false). Looks like semi-transparent areas are saved inacurately on export. What's more puzzling to me is why the results differ between dynamic loading and direct importing.</p> <p>What am I missing? In-depth explanation of these symptoms would be highly appreciated.</p> <hr/> <p><strong>EDIT1</strong> Here is that psd I'm stuck upon. Inside the zip you'll find <strong>transparency.psd</strong>, which has only two layers. I still have no luck in placing them into fla: transparent areas get dirty.</p> <p><a href="http://noregret.org/test/transparency.zip" rel="nofollow noreferrer">http://noregret.org/test/transparency.zip</a> (400 kb)</p> <hr/> <p><strong>EDIT2</strong> A fellow flash developer pointed me to "<strong>premultiplied alpha problem</strong>".</p> <p><a href="http://en.wikipedia.org/wiki/Alpha_compositing#Description" rel="nofollow noreferrer">http://en.wikipedia.org/wiki/Alpha_compositing#Description</a></p> <p>I think this must be the problem I'm trying to overcome.</p> <p>As far as I know by now, Photoshop internally uses straight alpha (premultiplying with white on PNG export) and <a href="http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/display/BitmapData.html#getPixel%28%29" rel="nofollow noreferrer">Flash uses premultiplied alpha</a>. But I still don't get it: what yields the difference in rendering of transparent images? And I still don't know exactly what operations I need to perform to get things look the same in PS and Flash (or at least how do I instruct our artists on preparing the images). </p> <p>Anyone? I'm continuing to dig Google for the answer.</p> <hr/> <p><strong>EDIT3</strong> Unfortunatelly, <strong>I can't flattern image</strong>. This example here is just a small part of a bigger picture. I have a rather complicated interface with a lot of semi-transparent elements on top of a texture. The picture looks cool (like it's made of crumpled cardboard or something). So, I need a texture and semi-transparent layout separately. Adding blendmodes to top layer in flash does solve "the ghosting areas" problem, but it also significantly changes the picture, which is not acceptable.</p> <hr/> <p>Semi-transparent layer:</p> <p><img src="https://i.stack.imgur.com/z3tWq.png" alt="enter image description here"></p> <p>Texture layer:</p> <p><img src="https://i.stack.imgur.com/Gf10E.png" alt="enter image description here"></p> <p>Results (screenshots of PS and Flash Player on Windows):</p> <ul> <li>Photoshop(original): <strong>Ok</strong></li> <li>Flash (import to fla): heavy ghost area</li> <li>Flash (png loading): light ghost area</li> </ul> <p><img src="https://i.stack.imgur.com/PgcVP.png" alt="enter image description here"></p>
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      1. POPNG with transparency from Photoshop to Flash: how to make .swf display exactly what .psd does?
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    1. COWould you mind putting up your loading code?
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    2. COI think it's irrelevant to the problem. Just created two instances of `flash.display.Loader`, added them to display list and called `load(new URLRequest("layer1.png"))`, nothing else. And still I get those ghost areas, which makes me think that the problem is how PS saves PNG files.
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      1. POPNG with transparency from Photoshop to Flash: how to make .swf display exactly what .psd does?
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    3. COIt might also be the alpha translation in the Flash player, have you tried importing your png back into photoshop and comparing that to the original when on the same background?
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