[Gimp-user] Opacity

[Lap1994]

Hello. I want to draw a image with a 50% opacity border.
When I change the opacity of the pencil and use it, the selected color and  
the color where I use the pencil, combine itself. I do not want it, I want  
draw a pixel with exact 50% of alpha and the color selected. Like a bitmap  
with a alpha channel.

Do not want: black pixel + %50 opacity, white color = silver
Want: black pixel + %50 opacity, white color = 50% opacity white pixel
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