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Masks don't get updated with the Perspective Tool


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Affinity Photo 2:

  1. Add Mask to some layers
  2. Select those layers
  3. Apply a perspective tool

Result:

The masks don't get transformed by the perspective tool

Expected:

I think this should just work?

image.png.0a46eb5f36765d62fef46bf601de5ed5.png

If the default mask is somehow set to not do this, I think it's a UX issue...

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Are all three images in the three "Background" layers the same image? Which of those layers did you apply the transform to? 

You could try grouping all three layers and then apply the transform to the group.

I have a feeling you are going to need to provide much more detailed information before people will be able to adequately help you. 

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Your observation is correct.

You can select multiple pixel layers and apply filters like perspective distortion to them, or use any tool on them like paint, inpaint, clone etc. These filters and tools only impact pixel layers, other nested layer types get ignored.

For your use case, you could:

  • Destructive option: rasterize the layers to bake-in the nested mask layers directly into the pixel layers alpha channel.
  • or use a non-destructive perspective filter as top layer. This will affect all layers below, regardless of layer type.

With help of channels panel, you can separate the alpha channel again later:

  • select a pixel layer
  • Using channel panel,
    • choose pixel alpha, create spare channel
    • fill in pixel alpha channel
  • add new mask layer
    • choose spare channel created before
    • load to mask alpha channel

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