Re: [Gimp-user] Layer Masks - Channel Masks
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 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) > ___ > gimp-user-list mailing list > List address:gimp-user-list@gnome.org > List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list > List archives: https://mail.gnome.org/archives/gimp-user-list > -- https://patdavid.net GPG: 66D1 7CA6 8088 4874 946D 18BD 67C7 6219 89E9 57AC ___ gimp-user-list mailing list List address:gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
Re: [Gimp-user] Layer masks
Dede1943 writes: The video ( ), if I understand it correctly, instructs one to: 1.Open the image. 2.Make a back up copy in layers. a. (since the second layer automatically adds a Alph Channel, I did not add one) 3.Select and activate the copy and add the Layer Mask. 4.Make sure the Layer Mask icon is highlighted and activated in the Layer dialog. 5.Select the paintbrush making sure that Black is selected as the Foreground color. 6.Brushing along any area of the image to select it should reveal the transparency layer but does not. I can see the black lines, I'm drawing on the center image on the Layer Mask icon in the Layers dialog, which is white. I haven't watched the video (I'm on a slow connection right now); but from those steps, it sounds like you have two identical layers, one above the other, and you're painting on the layer mask of the upper layer to make some of that layer transparent. But if the layer underneath it is another copy of the same layer, painting on the layer mask won't have any visible effect. You're making the layer invisible to see through it to a layer that looks identical. When I use layer masks in this way, I add a few steps between your steps 2 and 3: 2.1. Hide the original layer, so I'm working on the backup. 2.2. Create a new layer -- I tend to use a solid, garish color like magenta or bright green, something that will contrast a lot with the layer I'm masking. 2.3. Move the new sold-color layer to the bottom of the stack. You don't have to create the solid color layer (steps 2.2 and 2.3 are optional), but it makes it a lot easier to tell whether you've erased completely. Now proceed with creating the layer mask and painting on it, and you should see parts of the magenta (or whatever) layer appear. When you're happy with your layer mask, you can hide or delete the solid-color layer. ...Akkana ___ gimp-user-list mailing list List address:gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
