09-08-2021, 08:18 AM
(09-08-2021, 05:11 AM)aka Wrote: ....It remains a last thing, please : is it possible to edit an existing mask ? I don't find this function...
A mask is a greyscale image where White = 100% transparent Black = 100% opaque and 'any grey values', vary transparency.
You can make a mask on its own by creating a greyscale image.
More customary is to paint it straight into Gimp.
Click in a layer mask to make it active (active shows a white border on the layers icons)
Then paint in your canvas using White or Black. The X key swaps between foreground and background colours which makes editing quicker.
If you need to see and edit the mask, use Layer -> Mask -> Show layer Mask make you edit the turn it off.
When finished with the layer mask click in the layer icon (gives white border) for painting.
See if you can make sense of this: https://i.imgur.com/hSsYT6G.mp4