[EMAIL PROTECTED] (2003-09-08 at 2144.30 +0200):
> On Mon, 8 Sep 2003 21:18:32 +0200, Jean-Christophe Dubacq <[EMAIL PROTECTED]> wrote:
> > As I do not think my former message reached gimp-users, I will try there
> > (it also seems more fit, and I am subscribed):
> > 
> > Is there any way to directly edit the alpha layer of a layer. Layer
> > masks do only reduce the alpha, never increase it; and sometimes I would
> > like to somehow delete any opacity information in a layer, without
> > having to repaint all. So maybe there is a solution, but I didn't find
> > this (since editing a mask is not the answer)...

It is the way, I did an script for that, it passed alpha info to mask,
removing it from alpha, completly. If you can not find it, ask me.

> Anyway, please check the Eraser tool and enable the "anti-erase" option.
> This is an ugly hack, but this is probably what you are looking for.

Nice hack, I have been using it a lot latelly. For some things it is
enough and fast.

> I think that this option should disappear.  Instead, we should have an
> "undo brush".  Because in most cases, what you want to do is to
> recover some data that has been deleted by accident.  So you could get
> that from the undo history.  It does not make much sense to "un-erase"
> something if you do not know what was there before, even if this quick
> hack was easy to implement in the early versions of the GIMP.  So if
> it becomes possible later to "paint with undo," then we should remove
> the anti-erase option.

Fill layer with something, make some holes... change your mind,
rearrange holes. My usage was for hose brushes. Doing if from undo is
going to be a bit more complex technically, and will not only do
unerase, you will be able to undo paints too or filters, for example.

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