: The effect you are after can be achieved: Duplicate the image layer containing the forrest image make the new layer black and white invert the colors (ctrl/cmd+i) on the black and white image:

@Dunderdale640

The effect you are after can be achieved:


Duplicate the image layer containing the forrest image
make the new layer black and white
invert the colors (ctrl/cmd+i)
on the black and white image: select all (ctrl or cmd + a)
copy the selected
click the original image
create an image mask
go into channels
select mask channel
paste
hide the duplicated black and white image (that you used for the mask)


this should create a mask that makes the lighter areas more transparent.



Read more on the subject here: carijansen.com/2004/07/25/layer-mask-from-grayscale-image/

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