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When exporting a tiff in Photoshop to PNG (any format get's same issue) I get a white box around some of the shadows. If I export just the shadow layer, this doesn't show up, only when the foreground is present. I have tried changing every option I can see, but no luck. If I scale it down to 50% the artefact goes away, but I want to be able to export at 100%.

100% Scale At 100% scale, this white box shows up

50% Scale 50% scale, there is no box

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  • My guess would be the shadow has bending mode such as Multiply applied. PNGs can't contain bending modes. Possibly related: graphicdesign.stackexchange.com/questions/125762/… – Scott Nov 17 '20 at 23:28
  • Flatten the image before you attempt to export it. PNGs don't have layers anyway. – Billy Kerr Nov 18 '20 at 13:22
  • I tried both of the above and it didn't help unfortunately. Flattening the layers places the box there permanently. – Brett Nov 19 '20 at 14:10
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Just add a background yellow below on the second layer. If it doesn't change the problem is your second layer which you need to paint through a brush or shape then color it yellow.

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