gummipunkt Posted July 13, 2018 Share Posted July 13, 2018 Hi all, I tried to crop some pictures and have a problem. I crop the images and it works phantastic. The image looks good, transparency is ok and i save the amage as PNG. I upload it to Adobe Sparks and there is a white torn out edge around the house (where I cropped the background). I don't know why. When I upload it to img42 there is the white torn out edge too, but after a few seconds of processing the white torn out is gone away. I attached the sample images. Image 1) Adobe Sparks after upload, Img42 after Upload and before processing Image 2) Affinity after cropping Image 3) Affinity after cropping with a blue background layer Thanks for helping me. <3 Best, gummipunkt Quote Link to comment Share on other sites More sharing options...
Staff Dan C Posted July 13, 2018 Staff Share Posted July 13, 2018 Hi gummipunkt, Welcome to the forums! Could you please provide the .afphoto file in question so we can look into this for you? A screenshot showing your PNG export settings would also be helpful Quote Link to comment Share on other sites More sharing options...
gummipunkt Posted July 13, 2018 Author Share Posted July 13, 2018 Hi Dan, of course! freigestellt.afphoto Quote Link to comment Share on other sites More sharing options...
Staff Dan C Posted July 13, 2018 Staff Share Posted July 13, 2018 Thanks for that. If you delete the blue pixel layer and select the image, then go to Select>Alpha Range>Select Fully Transparent you will see that there is not complete transparency all the way to the edge of the house, and this is what is causing the white banding when you upload the image. I've used the above method, coupled with the smart selection brush tool to create a selection flush with the roof, then inverted the selection and masked off the semi transparent area and exported the image again. It now does not show the banding when uploaded to Img42 and I'm certain it won't in Sparks either. I hope this helps freigestellt1.afphoto Quote Link to comment Share on other sites More sharing options...
gummipunkt Posted July 13, 2018 Author Share Posted July 13, 2018 Dear Dan, thank you but... Ok, but why does this happen? I mean, I ever use the Smart Selection tool and in the preview there is a transparency overall. But when I save it, there are some rests of the background. I think this isn't normal but where is my problem? Best, Patrick Quote Link to comment Share on other sites More sharing options...
Staff Dan C Posted July 13, 2018 Staff Share Posted July 13, 2018 No problem The pixels are mostly transparent, meaning you can see the transparent checkerboard background behind them, but not completely transparent so they are still slightly visible on export. Clearly Img42 recognises this, hence they are displayed momentarily before the software decides to remove them from the image. It may be hard to see, as it is only a very slight change but you can see the checkerboard is slightly less bright where the semi transparent pixels are, this is where the Alpha selection comes in handy. Unfortunately I don't know the origin of these semi-transparent pixels as it is dependant on the origin of the image and how it has been previously altered. Quote Link to comment Share on other sites More sharing options...
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