07-26-2023, 02:39 PM
(07-26-2023, 02:15 PM)bunzler Wrote: But - as written in the first post - changing the alpha channel in the layer mask of my image will also change the opacity of the image itself.
I am looking for an option to edit the alpha channel without impacting the image itself.
The alpha channel is the transparency... It is not a random general purpose channel. And at the end of the day, you are going to export the RGB+alpha channels in a single image, with which, in most image viewers, the alpha value will be used to render transparency.
If you want to check the fully opaque image, once you have added a layer mask you can "disable" it (Layer > Mask > Disable layer mask).
Another option is to add a layer below the image, set your initial image layer's Composite mode to Clip to backdrop and edit the alpha of the underlying layer. Then your layer is unchanged (and you can see it fully by clicking the visibility of the alpha-edited layer, but when you export the image the alpha of the alpha edition layer ends up in the alpha channel of the image.