Problem when two layermasks in one picture

[Anke Lange]

Hello list

I just came across a problem, that I have never came across in gimp2.6.

When isolating a flower from the background, it works fine.
Put another transparent layer on top, making a stroke with white paint.
Add a layermask to this layer.
Now using a black brush on the layermask to make some of the white
stroke transparent.

The flower underneath becomes transparent, and the white stroke doesn't
becomes transperent on some places, the black brush doesn't seem to work
on the layermask.

Is this a known bug?

Thanks for your help

Anke

--
Anke Lange
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www.kreativ-workshops.net
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[Richard Gitschlag]

> Date: Fri, 20 Jul 2012 21:31:43 +0200

> From: [hidden email]
> To: [hidden email]
> Subject: [Gimp-developer] Problem when two layermasks in one picture
>
> Hello list
>
> I just came across a problem, that I have never came across in gimp2.6.
>
> When isolating a flower from the background, it works fine.
> Put another transparent layer on top, making a stroke with white paint.
> Add a layermask to this layer.
> Now using a black brush on the layermask to make some of the white
> stroke transparent.
>
> The flower underneath becomes transparent, and the white stroke doesn't
> becomes transperent on some places, the black brush doesn't seem to work
> on the layermask.
>
> Is this a known bug?
>
> Thanks for your help
>
> Anke
>

Can't reproduce the problem on my own GIMP 2.8.0 - was I reading the steps correctly?

I tried:
1 - Open a convenient image, add layer mask (full opacity).
2 - Switch to the layer mask and paint away. (works as expected)
3 - Add a new layer (transparent) and paint some strokes
4 - Add a layer mask (full opacity) to the second layer.
5 - Switch to the layer mask and paint away. (still works as expected)

Remember that adding a new layer mask doesn't automatically switch to it for editing - you must do that yourself.  From what you describe, it sounds like you're actually editing the first layer mask (the flower layer) instead of the second (the white stroke layer).

-- Stratadrake
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--------------------
Numbers may not lie, but neither do they tell the whole truth.

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[Anke Lange]

Am 21.07.2012 02:00, schrieb Richard Gitschlag:

...

Can't reproduce the problem on my own GIMP 2.8.0 - was I reading the steps correctly?

I tried:
1 - Open a convenient image, add layer mask (full opacity).
2 - Switch to the layer mask and paint away. (works as expected)
3 - Add a new layer (transparent) and paint some strokes
4 - Add a layer mask (full opacity) to the second layer.
5 - Switch to the layer mask and paint away. (still works as expected)

Remember that adding a new layer mask doesn't automatically switch to it for editing - you must do that yourself.  From what you describe, it sounds like you're actually editing the first layer mask (the flower layer) instead of the second (the white stroke layer).

-- Stratadrake
[hidden email]
--------------------
Numbers may not lie, but neither do they tell the whole truth.

Hi

I wrote a course for learning to use gimp2.8 with a tutorial of how to use layer masks for out of bounds pictures.
One of my course-members had problems with this tutorial, so I worked it out again to be sure, that the tutorial is correct in all steps.
That was when I found out what the problem was, because I had the same problem with the second layer mask.

The only reason, that I could think of, why you can't reproduce this is that the student and I both work with Linux Ubuntu (me Xubuntu). Do you work on Windows?

Gimp looks strange as well, when I have the gimp-window on top of a Firefox-windows whatching a you-tube video, I can watch the video trough the gimp-window.

I'm not sure of how to proceed now, do I report this to Ubuntu-developer-list?

Thanks in advance

Anke


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[Christopher Curtis]

On Sat, Jul 21, 2012 at 2:11 AM, Anke Lange <[hidden email]> wrote:

Gimp looks strange as well, when I have the gimp-window on top of a Firefox-windows whatching a you-tube video, I can watch the video trough the gimp-window.

I'm not sure of how to proceed now, do I report this to Ubuntu-developer-list?

FWIW, this is unrelated to GIMP. Firefox+flash draws over itself; Konqueror/rekonq does the same; Chromium always renders within bounds but sometimes inverts the red/blue chroma. In general it's all a mess under (K)Ubuntu; I don't know about other distros.

Chris

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