Dave M G wrote:
I'm a long time and proficient PhotoShop user trying to learn how
to work in GIMP.
My goal is to colour comic book style images using GIMP. I'm okay
with not having CMYK support, as my images are most likely to appear
on the web.
What I do is scan inked images with Xsane as line art. Then what I
want to do is create a layer that is pure black, and use the scanned
image as an alpha channel for that layer. That way I can add colours
underneath the layer, without affecting the line art.
However, I'm stuck as to exactly how to create that alpha channel.
I can create an alpha channel for a layer, but I can neither paste the
line art image into that alpha channel, nor can I seem to invert the
image so the right parts are transparent and the right parts are opaque.
Can anyone provide instructions or direct me to a tutorial for this
sort of thing? I will gladly RTFM if someone can show me where in the
FM to R.
Also, I have other concerns on the horizon which pertain to
colouring inked comic images using GIMP. Things like ensuring there is
no anti-aliasing when I use any of the tools. There are lots of
tutorials of this nature for PhotoShop, but I was unable to find any
that had GIMP specific instructions. If anyone knows of good
directions for comic art using GIMP, that would help a lot.
I look forward to any advice, and hope to hear from you soon.
Dave M G
Gimp-user mailing list
Not sure if this might help. How about -
(1) Start by creating a transparent base layer - File=> New=> Advanced
Options=> Fill With=> Transparency
(2) Make a new layer to carry your line art - Layer Dialog=> New
Layer=> Layer Fill Type=> White (if you want a white background to the
lines) or Background (if you want a black background to the
lines: N.B. on the main GIMP panel, check the panel in the
bottom Left corner, where there are two large oblongs, one in front of
the other, and two tiny ones, ditto. If the large oblong behind
(i.e.background) is white, click on the double-headed bent arrow at its
upper right-hand corner; this will switch the colours of the large
oblongs (foreground and background), making the background black).
(3) get or copy your line art onto this new layer. It will have to be
white on the black background or black on the white background. (If you
use, say the Gimp pencil tool, which always draws in foreground colour,
you may need to swop foreground and background colours by clicking the
bent double-headed arrow by the large oblongs in order to get the right
colour for drawing).
(4) Right click on the image=> Select=> By Colour. Carefully position
the mouse arrow over a line somewhere and left click. This will select
your line drawings. Ctrl-X (or Right click=> Edit=> Cut) to cut the
colour of the layer under the lines and make them transparent to the
(5) What colour do you want your lines to show at? Go back to the main
GIMP panel and the large oblongs. Double click in one or the other
(foreground or background). This brings up a
panel, Change Foreground (or Background) Colour. When you've selected
the desired colour and clicked OK, the appropriate oblong on the main
GIMP panel should now take on that colour.
Go back to the Layers Dialog. New Layer=> Layer Fill Dialog. Choose
Background colour or Foreground colour (depending which you've
coloured). You then have a coloured layer.
(6) Move the coloured layer down. Layer Dialog=> Down arrow. Your line
art should appear coloured on your white (or black) ground in the colour
of the coloured layer.
I hope that's relevant.
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