Re: [Gimp-user] Layer Masks - Channel Masks

[Pat David <patdavid gmail com>]

There's a Layer Mask tutorial on the website to walk you through the basics
of using them if it helps:

https://www.gimp.org/tutorials/Layer_Masks/

On Wed, Aug 15, 2018 at 10:47 AM rich404 <forums gimpusers com> wrote:

> > I am a NewBee to Gimp 2.10. I was attempting to cut the background
> > from an image.  My first attempt was using a Channel Mask following a
> > tutorial online. The results were not what I expected, instead of
> > background with nothing I got a background with a very faded image.
> > Next, I attempted to do the same with a Layer Mask.  The results were
> > the same.
> > Would someone kindly help me out? Thank you
>
> Was that a Photoshop tutorial by any chance?
>
> Your description of a faded image, could be just a poor
> selection-to-channel ,
> maybe you just made the channel visible, that does not do anything except
> dim
> parts of the image.
>
> There are different ways to use the channel, put it to a selection and cut
> the
> selection or use a layer mask. A layer mask is non-destructive and a good
> way to
> go.
>
> Starting off with a channel. It does need to be mainly black and white, if
> you
> have lots of grayscale then this comes out as semi-transparent. Need
> something
> like this screenshot: https://i.imgur.com/DteBKxV.jpg
>
> Just turn the visibility of that channel off, go to the layers dialogue
> and make
> the layer active. Now you can use Layer -> Mask -> Add Layer Mask and
> create a
> mask from the channel: https://i.imgur.com/gUyyVZa.jpg
>
> Which gives this: https://i.imgur.com/fZ1IBk1.jpg
>
> Save your work as a Gimp .xcf which saves all layers, channels, masks.
> Export to
> a png which will flatten to one layer but keep the transparency.
>
> rich: www.gimp-forum.net
>
> --
> rich404 (via www.gimpusers.com/forums)
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