WRITTEN_BY David REVOY -
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55 comments
[youtube]x7QMdgxtNY8[/youtube]
_Video with a quick description/demo of the brushes, how-to install, and a timelapse._
[info]**Update:** This three brush are now installed by default in Krita 4, you probably already have them installed in your brush list.[/info]
Here is three new presets inspired by charcoal pencils, colored pencils and pencils in general. In short; these are just preset with a sublte grainy paper easy on eyes, with a cool and smooth grain and with also a sweet pressure curve. I hope you'll like them and have fun maintaining a digital-sketchbook folder!
## Download:
**[2017-01-18_Charcoal_pencils.zip](http://www.peppercarrot.com/extras/resources/2017-01-18_Charcoal_pencils.zip "2017-01-18_Charcoal_pencils.zip" )**
## Install:
See the video for detailed install instructions. In short: Download, extract, open Krita and go to **Setting > Manage Ressources**, press the **Import Bundles** button, and target the extracted bundle file, press Ok, restart Krita. Compatible with Krita 3.0 and up.
## License:
This brushes are licensed under the [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/ "Creative Commons Attribution 4.0" ) to "David Revoy, www.davidrevoy.com".
This attribution is necessary in case of redistributing, commercializing, or modifying the brushes.
This attribution is not necessary in case of usage (you can paint any artwork you want with it, you still own totally your artwork).
This attribution is not necessary in case of doing screenshot/screenrecording of Krita and have the brushes visible.
WRITTEN_BY David REVOY -
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30 comments
Here are my notes about the **Colorize Lineart[smart coloring]**, a new GMIC filter to auto-colorize line-art created by David Tschumperlé, Sébastien Fourey and me.
The workflow of this filter is really simple as you can see on the picture of the top:
1. Open your black and white line-art
2. Send it to the GMIC filter Black&White > **Colorize Lineart[smart coloring]** the filter will auto-colorize all the areas for you with random bright colors and split two layers: your line-art above the generated color-map.
3. Open the result (the filter is really quick) in your digital-painting program, and flood-fill/replace the colormap areas with the colors of your choice.
4. Shade on the top, paint, color-corrections and voilà!
**The filter :**
When launching **Colorize Lineart[smart coloring]** , the preview display red nodes at the end point of each detected lines, then between the nodes a bezier curve in blue is generated to help 'fixing' the tiny holes in the line-art, or fix the artistic 'missing lines' suggested by the artist. When applying the filter, the node in red and the blue lines disapear to let only two layers: the line-art and the color-map.
**Pros**
- Free/Libre and open-source.
- (a.) Auto-close holes in line-art. ( eg. I made two simple test-artwork: on top with closed lines, on bottom with arbitrary holes in the lines. The filter find the holes, and reconstruct a bezier curved line to smooth the limit. )
- (b.) Result of colormap are clean aliased pure color areas easy to replace with a fill-bucket at low tolerance, with line-art over just perfectly center above it. No problem with the anti-aliasing or bluryness of the line-art (eg. a closeup without the line-art on left, with line-art over it on right ).
- Quick to use, just a filter to launch and quick to compute compare to all the other method I tested.
- (c.) Let you use your digital-painting software for coloring with your tools, palettes, color selections, etc. (eg. I can color in Krita taking advantage of the "Reference Docker" as a palette for color references, also fill-bucket on Krita is super quick and you can click 'Ctrl' to pick color with it at any time , or press 'e' to fill with 'eraser' blending mode, and get full transparency to remove backgrounds.)
**Cons**
- (d.) Some areas are sometime ignored or merged together. (eg: circled in red, some zone of the fur of the cat Carrot are merged with the body color. This part will need to post-fix the color map with an aliased brush , painting it manually ).
- (e.) Line-art with a lot of crosshatching render with two much little islands on the color-map to use it. it's definitely not a style suited for this filter. (eg. a pencil artwork of Pepper&Carrot episode 11, color map is crazy on the moon in background of the characters.)
- (f.) A limitation of the GMIC Gimp plugin; the preview windows is not really "What You See Is What You Get", it needs a lot of trials and errors for an artist to test the settings (a lot of sliders) and get a setup working with a style.
## Install/test
You can already test this filter in GMIC 1.7.9 and 1.8.0beta, I'm using here the GMIC plugin for GIMP, import/export as open-raster *.ora files my line-art and islands to fill and paint them in Krita. For using the filter directly in Krita, we need to wait; last version of Krita 3.1.1 embed only GMIC version 1.7.0.
### More informations
Everyone reading my blog already know David Tschumperlé: he is the creator, manager and main developer of [GMIC](http://gmic.eu/) and a good friend. He is a permanent CNRS research scientist, working in the Image group of the GREYC Lab in Caen. Last November, I was invited to join during a couple of day his workplace to work on the research of a "Style transfert" method. Style transfer is a technique to create an image from two sources; -in a nutshell- your holiday best landscape photo and a masterpiece of Vincent van Gogh. The expected result: your holiday photo painted in the style of Vincent van Gogh. Some algorythm already does it, but the results are variable and the existing methods needs a lot of computing time and big databases. At GREYC, the plan is to find a better and more lightweight solution, filter based. As an artist, I was invited to show how I break-down the copy of a painting and give informations on how I perform this "Style transfert" manually as I did on [this video](https://youtu.be/bbL7qeVAaC8).
During this short period of work we had in Caen, I made a conference for scientists at CNRS. At the end of the conference, I presented the [making-of episode 12](article306/tons-of-potions-part-2-multifill) of my webcomic Pepper&Carrot as a proof-of-concept about merging multi computer tools: filters, scan, 3D, etc.... This episode mix also a lot of GMIC filters and a very old script for GIMP named Multifill. It's a filter I used [6 years ago](article32/comics-inking-and-coloring-with-gimp-painter) on my early comic-style test. Unfortunately, with newer version of Gimp, the filter became very buggy, slow and unmaintained. David was surprised to learn that it took hours for this filter to auto-floodfill all the potion on episode 12. Two hours after the conference, he made a version of Multi-Fill in GMIC named Colorize lineart[auto-fill]. His filter matched the same work than 'Multifill' but in less than 30seconds!
A couple of discussion later in front of a "Coloring Pages" hanging on the wall and colored by a kid of the crew, we started to share common issues of automatic coloring filter and what method exists to colorize black and white line-art.
The work on the new filter **Colorize Lineart[smart coloring]** came later after I came back home. I started testing it and giving feedback while David Tschumperlé and Sébastien Fourey kept improving it.
## Gallery
I'm still testing the filter. A single panel of comic here, a little artwork there. Here is a gallery of recent works made with it.
## Your feedback?
A lot of digital artists reads my blog ; so question for you: what do you think about this new method? Do you think it can save you time when coloring your line-art? Would you plan to use it? Do you have a quicker method? Let me know on the comments.
WRITTEN_BY David REVOY -
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5 comments
I wish you all a Happy New Year 2017! I wish you health, success in your projects and of course many new Pepper&Carrot episodes! Let's make 2017 better than every year we saw so far!
[Krita sources file available here](https://www.peppercarrot.com/0_sources/0ther/artworks/zip/2017-01-01_Happy-New-Year_by-David-Revoy.zip "sources available here" )
