Post Reply 

Drawing help(blue line-erase)

Nov 6, 2011, 15:09
Post: #1
Question Drawing help(blue line-erase)
I have been drawing with gimp for a while. I usually just use the Paintbrush , Pencil and Ink tools to complete my projects.
Recently, I have been trying to use the "color erase" function on the Paintbrush tool, but it hasn't been going as planned.
What I would like to do is draw an outline in one color (blue or red) and then trace it in black.
this way, I can make all the technical lines I want to and then erase them later.
Is there a better way for me to do this? Basically delete all colors but a few of them?
I could really use some help with this, I've spent hours trying to figure it out Huh
Find all posts by this user
Quote this message in a reply
Nov 6, 2011, 17:27
Post: #2
RE: Drawing help(blue line-erase)
(Nov 6, 2011 15:09)DelRio1991 Wrote:  I have been drawing with gimp for a while. I usually just use the Paintbrush , Pencil and Ink tools to complete my projects.
Recently, I have been trying to use the "color erase" function on the Paintbrush tool, but it hasn't been going as planned.
What I would like to do is draw an outline in one color (blue or red) and then trace it in black.
this way, I can make all the technical lines I want to and then erase them later.
Is there a better way for me to do this? Basically delete all colors but a few of them?
I could really use some help with this, I've spent hours trying to figure it out Huh
Erasing after the fact won't give good results. If you want to make "technical lines" to guide your drawing, there are better solutions:
  • Guides (Image/Guides and View/Snap to guides). Only horizontal/vertical lines (and their intersections) but that covers a lot of needs.
  • Grid (Image/Configure grid, and View/Snap to grid): basically a regular pattern of guides with active intersections.
  • Paths: the completely overlooked feature. You can draw paths that won't be on any layers (as long as you don't stroke them) and have things snap to the active path (View/Snap to active path). Paths are naturally "clean": straight lines or controlled curves, and there are scripts to generate paths that are geometric figures.
  • Auxiliary layer: add a transparent layer on top and draw your technical lines on it. Then make it invisible before exporting the final result.

Now answering your questions on
https://Gimp-Forum.net
Visit this user's website Find all posts by this user
Quote this message in a reply
Nov 8, 2011, 00:19
Post: #3
RE: Drawing help(blue line-erase)
(Nov 6, 2011 17:27)ofnuts Wrote:  
(Nov 6, 2011 15:09)DelRio1991 Wrote:  I have been drawing with gimp for a while. I usually just use the Paintbrush , Pencil and Ink tools to complete my projects.
Recently, I have been trying to use the "color erase" function on the Paintbrush tool, but it hasn't been going as planned.
What I would like to do is draw an outline in one color (blue or red) and then trace it in black.
this way, I can make all the technical lines I want to and then erase them later.
Is there a better way for me to do this? Basically delete all colors but a few of them?
I could really use some help with this, I've spent hours trying to figure it out Huh
Erasing after the fact won't give good results. If you want to make "technical lines" to guide your drawing, there are better solutions:
  • Guides (Image/Guides and View/Snap to guides). Only horizontal/vertical lines (and their intersections) but that covers a lot of needs.
  • Grid (Image/Configure grid, and View/Snap to grid): basically a regular pattern of guides with active intersections.
  • Paths: the completely overlooked feature. You can draw paths that won't be on any layers (as long as you don't stroke them) and have things snap to the active path (View/Snap to active path). Paths are naturally "clean": straight lines or controlled curves, and there are scripts to generate paths that are geometric figures.
  • Auxiliary layer: add a transparent layer on top and draw your technical lines on it. Then make it invisible before exporting the final result.

I would have never thought to use an invisible layer, thanks! Blush
Can you tell me more about paths? You had me at overlooked feature.
Find all posts by this user
Quote this message in a reply
Nov 8, 2011, 00:39
Post: #4
RE: Drawing help(blue line-erase)
For paths, have a look at this http://docs.gimp.org/en/gimp-using-paths.html and the rest of the chapter on Paths. They have several uses (typically: drawing regular lines and making clean selections) and the specific use I hinted at is incidental, but still very handy at times.

Now answering your questions on
https://Gimp-Forum.net
Visit this user's website Find all posts by this user
Quote this message in a reply
Post Reply 


Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  Trouble "cartoonifying" drawing hbabbcook 1 150 Jul 16, 2017 09:09
Last Post: ythgilb
  detailed pencil drawing to white background misterroy 3 298 Oct 10, 2014 09:11
Last Post: rich2005
  Changing a silhouette to line art Tropdoug 3 337 Oct 7, 2014 07:51
Last Post: rich2005
  Can't find line tool? FluffyMuffins230 4 397 Oct 1, 2014 16:24
Last Post: FluffyMuffins230
  Lithophane/line image djh256 3 375 Sep 16, 2014 14:06
Last Post: djh256

Forum Jump:


GIMP ForumPortalArchiveContactTermsRSS