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Unintended blur after application of curves

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In Affinity Photo 1.5.2 applying curves to a previously rotated layer and afterwards merging the mask with this layer creates an unintended blur (cf. attached screenshots and AP file). 


Interestingly, the effect does not happen if the layers are merged with "Merge Visible".


Could be a bug. (The "Force Pixel Alignment" setting was turned on.)


Steps to reproduce behaviour:

  1. Duplicate layer and rotate (eg. by 15°)
  2. Apply curve
  3. Merge mask with layer ("Merge Selected")

Kind regards,






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Hi Anitram,

Welcome to the forum, sorry for the delay in responding. Would you be able to expand a bit more on Step 3 at all please? I've tried merge visible and that is fine as you say, however selecting both the object and the curve doesn't allow me to do Merge Selected. Could you do a screen recording of you reproducing the issue please?


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