Re: [Gimp-user] alpha channels vs masks

2012-09-28 Thread Simon Budig
Richard Gitschlag (strata_ran...@hotmail.com) wrote: > > From: si...@budig.de > > ...because mitch discovered a nasty bug with this and this has not been > > fixed yet... > ...like how layer groups don't have a fixed size and their > width/height are automatically derived from the size/placement of

Re: [Gimp-user] alpha channels vs masks

2012-09-28 Thread Richard Gitschlag
...like how layer groups don't have a fixed size and their width/height are automatically derived from the size/placement of their constituent layers? There would be an easy workaround if only we had a "Multiply with alpha" layer blending mode so I could put a white masking layer at the top of

[Gimp-user] Gimp 2.8 is too slow on OS X and the new sliders are confusing

2012-09-28 Thread yyy3r
Hi, just wanted to say I've been using Gimp for many years on my Mac and I used to be very satisfied with it, but the recent update (version 2.8) has disappointed me.  First of all, gradient generation is very slow using version 2.8 in compare to version 2.6, especially on large canvases. It ta

Re: [Gimp-user] alpha channels vs masks

2012-09-28 Thread Elle Stone
Hi Bernie, You are right. Open an image, create an empty transparent layer and put the empty layer below the image layer. Create a mask on the image layer and paint black where you want a transparent background. The transparent layer automatically has an alpha channel and so does the exported png

Re: [Gimp-user] alpha channels vs masks

2012-09-28 Thread Burnie West
On 09/27/2012 09:09 AM, Elle Stone wrote: So again, is there anything that can be done using an alpha channel, that can't be done using masks and layers, or vice versa? Normally, when I want a transparent background in a WEB image I will use the alpha channel. Never tried to do that with layer m

Re: [Gimp-user] enlarging tiny photo

2012-09-28 Thread maderios
On 09/28/2012 07:14 PM, Patricia wrote: Took pic over Skype. Other person involved was using a mobile phone so pic is very small. Trying to enlarge but it becomes fuzzy and pixilates. Any way to enlarge and get a decent photo. I am using Gimp 2.6. My method: I open the file with Gliv (o

[Gimp-user] enlarging tiny photo

2012-09-28 Thread Patricia
Took pic over Skype. Other person involved was using a mobile phone so pic is very small. Trying to enlarge but it becomes fuzzy and pixilates. Any way to enlarge and get a decent photo. I am using Gimp 2.6. -- Patricia (via gimpusers.com) ___ gim

Re: [Gimp-user] alpha channels vs masks

2012-09-28 Thread Simon Budig
Richard Gitschlag (strata_ran...@hotmail.com) wrote: > Finally ... well, it seems that you can't actually add a layer mask to > a layer group as a whole. I don't see why not though - that would > give the ability to mask off a group of layers all at once. ...because mitch discovered a nasty bug w

Re: [Gimp-user] alpha channels vs masks

2012-09-28 Thread Richard Gitschlag
Generally speaking, you can't directly modify the values of a layer's alpha channel: Paint tools (paintbrush, etc.) only ever increase a layer's alpha channel (by the tool's opacity factor), Eraser tool only ever decreases it. A layer mask gives you direct and more precise control over a layer