(12-15-2023, 08:26 AM)saltasaurus Wrote: Hello, I would like to copy the alpha channel of a layer in another image to a target image. Wondering what the steps are, thank you!
The basics.
For the image with the alpha channel
Layer -> Mask -> Add layer Mask and choose Layer's Alpha Channel
Select the mask in the layers dock (selected it has a white border, not always obvious depending on the alpha )
Copy the mask.
For the destination image.
Layer -> Mask -> Add Layer Mask and choose Black (full transparency)
Select the mask in the layer dock and Edit -> Paste then anchor it.
Apply the layer mask Layer -> Mask -> Apply Layer Mask
This a 30 second demo with a very obvious alpha channel.
https://i.imgur.com/iSeuq1P.mp4