[Gimp-user] How do I prevent the paint tool from drawing outside of the selection?

[wizzythegrape <forums gimpusers com>]

> The marching ants are not the limit of the selection, they are where
> the
> selection has a 50% value, so pixels outside the area marked by the
> ants
> can be partially selected. Each time you paint over them they are 
> painted slightly. This isn't noticeable on the first strokes but
> become
> more visible after several strokes.
>
> For what you want to do, protecting pixels with a selection isn't an 
> efficient technique (problems such a the one above, halos, jagged 
> edges...). You should be using Color-to-alpha (or paint in Color Erase
> mode) to remove the old color, and apply the new color in "Behind"
> mode.
>
> Some more explanations here: 
> http://gimpforums.com/thread-proper-subject-extraction-background-removal-and-background-painting<http://gimpforums.com/thread-proper-subject-extraction-background-removal-and-background-painting>

Thanks, this is way better than what I was doing.

-- 
wizzythegrape (via www.gimpusers.com/forums)