: How to select a difference of two layers? Consider the following two files. Background: Background with some content on top: How do I get a flat image that is content-background? ie. the

@Caterina889

Turn off visibility for paragraph layer ("Each correct answer
will...")
New Layer above all other layers (Command/Ctrl-Option/Alt-Shift-N)
Merge Visible (Command/Ctrl-Option/Alt-Shift-E)
Turn off visibility for all other layers
Select all (Command/Ctl-a)
Copy (Command/Ctrl-c)
Add Layer Mask
Select Layer Mask (Command/Ctrl-)
Paste (Command/Ctrl-v)
Adjust levels to bring up the white nad red and reduce the black.

Turn on visibility fo the paragraph layer ("Each Correct Answer
will...")
Save for web





To retain all the blood - on or off text


Set both the blood layers to Normal.
Remove the mask on the one layer.
Merge the two layers
Choose Select > Color Range and click a white area of the layer
Hit OK
Inverse Selection (Select > Inverse)
Add layer mask
Set layer to multiply.


This leaves you with this...
(grey background used to show transparency)



You can then further mask the blood if you'd like.

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@Cofer715

With a help from the mysterious scratchpost I managed to do it.


hide all the layers that are of no interest (ie. keep only the blood stains)
cmd + click red channel (this will select only the blood stains).
restore visibility of all the layers
flatten the image
cut out the selection
unflatten the image, remove/hide the bloodstain layers, paste the clipboard.

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