How to Upload a Scan in Krita

Flat Coloring¶

So yous've got a cool black on white drawing, and now you desire to color it! The thing we'll aim for in this tutorial is to go your line art colored in with apartment colors. And so no shading just withal. We'll be going through some techniques for preparing the line art, and we'll exist using the layer docker to put each colour on a separate layer, so we can easily access each color when we add together shading.

Note

This tutorial is adjusted from this tutorial by the original author.

Agreement Layers¶

To fill line art comfortably, it's best to accept advantage of the layerstack. The layer stack is pretty crawly, and information technology's i of those features that make digital fine art super-user-friendly.

In traditional fine art, it is not uncommon to first describe the full background earlier cartoon the field of study. Or to first depict a line art and so color information technology in. Computers have a like way of working.

In programming, if you tell a computer to draw a cerise circle, and then afterwards tell it to draw a smaller xanthous circle, you will see the small-scale yellow circle overlap the red circle. Switch the commands around, and you will not see the yellow circumvolve at all: it was drawn before the ruby-red circumvolve and thus 'behind' it.

This is referred to as the "drawing order". So like the traditional creative person, the computer will first depict the images that are behind everything, and layer the subject and foreground on height of it. The layer docker is a way for yous to control the drawing order of multiple images, so for example, you tin can have your line fine art drawn later on than your colors, meaning that the lines volition be fatigued over the colors, making information technology easier to make it neat!

Other things that a layer stack tin do are blending the colors of unlike layers differently with blending modes, using a filter in the layer stack, or using a mask that allows you to brand parts transparent.

Tip

Programmers talk about transparency every bit ''Blastoff'', which is because the 'a' symbol is used to present transparency in the algorithms for painting ane color on top of another. Commonly when y'all see the give-and-take ''Alpha'' in a graphics program, only think of it equally affecting the transparency.

Preparing your line art¶

Put the new layer underneath the layer containing the line fine art (drag and drop or use the up/downward arrows for that), and depict on it.

…And observe nix happening. This is because the white isn't transparent. Yous wouldn't really want it to either, how else would you make convincing highlights? And so what nosotros first need to practise to color in our drawing is ready our line fine art. There'due south several methods of doing so, each with varying qualities.

The Multiply Blending Fashion¶

Then, typically, to get a black and white line art usable for coloring, yous can set the blending mode of the line art layer to Multiply. Y'all practise this past selecting the layer and going to the drop-downwardly that says Normal and setting that to Multiply.

And so you should exist able to run into your colors!

Multiply is not a perfect solution however. For instance, if through some paradigm editing magic I make the line fine art bluish, it results into this:

This is because multiply literally multiplies the colors. Then it uses maths!

What information technology first does is take the values of the RGB channels, then divides them by the max (because we're in 8bit, this is 255), a procedure we call normalising. So it multiplies the normalized values. Finally, it takes the outcome and multiplies it with 255 again to get the upshot values.

	Pink	Pink (normalized)	Bluish	Blue (normalized)	Normalized, multiplied	Outcome
Red	222	0.8705	92	0.3607	0.3139	80
Green	144	0.5647	176	0.6902	0.3897	99
Blueish	123	0.4823	215	0.8431	0.4066	103

This isn't completely undesirable, and a lot of artists employ this effect to add together a trivial richness to their colors.

Advantages¶

Easy, tin can piece of work to your benefit even with colored lines by softening the look of the lines while keeping nice contrast.

Disadvantages¶

Not really transparent. Is a petty funny with colored lines.

Using Selections¶

The second method is one where we'll make information technology actually transparent. In other programs this would exist washed via the channel docker, just Krita doesn't practice custom channels, instead it uses Selection Masks to store custom selections.

1. Duplicate your line fine art layer.

2. Convert the duplicate to a pick mask. the layer, then .

   

3. Invert the selection mask. .

4. Make a new layer, and practice .

   

And you should now have the line art on a dissever layer.

Advantages¶

Actual transparency.

Disadvantages¶

Doesn't work when the line art is colored.

Using Masks¶

This is a simpler variation of the above.

1. Make a filled layer underneath the line art layer.

   

2. Catechumen the line art layer to a transparency mask the layer, then .

   

3. Invert the transparency mask by going to .

   

Advantages¶

Actual transparency. You can also very easily doodle a design on the filled layer where the mask is on without affecting the transparency.

Disadvantages¶

Doesn't piece of work when the line art is colored already. We can all the same get faster.

Using Colour to Alpha¶

Past far the fastest way to go transparent line art.

1. Select the line fine art layer and apply the Filter: Color to Alpha dialog under bill of fare item. The default values should exist sufficient for line art.

Advantages¶

Actual transparency. Works with colored line art likewise, because it removes the white specifically.

Disadvantages¶

You'll have to lock the layer transparency or separate out the blastoff via the correct-click menu if you lot want to easily color it.

Coloring the image¶

Much like preparing the line art, in that location are many different ways of coloring a layer.

You lot could for example fill in everything by mitt, only while that is very precise it likewise takes a lot of piece of work. Permit's take a look at the other options, shall nosotros?

Fill Tool¶

In nearly cases the fill-tool can't deal with the anti-aliasing (the soft border in your line art to brand it more smooth when zoomed out) In Krita you lot take the grow-shrink option. Setting that to say… two expands the color two pixels.

Threshold decides when the fill up-tool should consider a different colour pixel to be a edge. And the feathering adds an extra soft border to the fill.

Now, if yous click on a gapless-office of the epitome with your preferred colour… (Remember to set up the opacity to 1.0!)

Depending on your line art, you tin can practise flats pretty quickly. But setting the threshold low can outcome in footling artifacts effectually where lines meet:

Even so, setting the threshold high can end with the fill non recognizing some of the lighter lines. Besides these little artifacts tin be removed with the brush easily.

Advantages¶

Pretty darn quick depending on the available settings.

Disadvantages¶

Again, not great with gaps or details. And it works all-time with aliased line art.

Selections¶

Selections work using the selection tools.

For example with the Path Selection Tool you can easily select a curved area, and the with Shift + (not + Shift , in that location's a difference!) you can easily add to an existing option.

You tin also edit the choice if you accept turned on. Then you lot can select the global option mask, and paint on it. (Above with the culling selection mode, activated in the lower-left corner of the stats bar)

When done, select the color you desire to fill information technology with and press the Shift + Backspace shortcut.

Yous can salvage selections in selection masks by a layer, and then going to . You first need to deactivate a pick by pressing the circle earlier adding a new selection.

This can serve as an alternative way to split up out dissimilar parts of the epitome, which is skillful for more painterly pieces:

Advantages¶

A bit more precise than filling.

Disadvantages¶

Previewing your colour isn't as easy.

Geometric tools¶

So you have a tool for making rectangles or circles. And in the example of Krita, a tool for bezier curves. Select the path tool (), and gear up the tool options to fill=foreground and outline=none. Make sure that your opacity is set to 1.00 (fully opaque).

By clicking and holding, you can influence how curvy a line draw with the path tool is going to be. Letting become of the mouse button confirms the activity, and then you're complimentary to draw the adjacent signal.

You lot can also erase with a geometric tool. Just press the Due east central or the eraser push button.

Advantages¶

Quicker than using the castor or selections. As well decent with line fine art that contains gaps.

Disadvantages¶

Fiddly details aren't like shooting fish in a barrel to fill up in with this. So I recommend skipping those and filling them in subsequently with a brush.

Colorize Mask¶

So it works like this:

1. Select the colorize mask tool.

2. Tick the layer yous're using.

3. Pigment the colors yous want to use on the colorize mask.

4. Click update to see the results:

When y'all are satisfied, the colorize mask, and go to . This will turn the colorize mask to a generic paint layer. Then, yous can gear up the last issues by making the line fine art semi-transparent and painting the flaws away with a pixel art castor.

So, when you lot are done, separate the layers via . There are a few options you can choose, just the post-obit should be fine:

Finally, press Ok and you should get the post-obit. Each color patch it on a different layer, named by the palette in the menu and alpha locked, then y'all tin start painting right away!

Advantages¶

Works with anti-aliased line art. Really quick to get the base work done. Can auto-shut gaps.

Disadvantages¶

No anti-aliasing of its own. You lot have to choose between getting details right or the gaps motorcar-closed.

Conclusion¶

I hope this has given you a good thought of how to fill in flats using the various techniques, also equally getting a hand of different Krita features. Remember that a good flat filled line art is better than a badly shaded ane, so proceed practicing to become the all-time out of these techniques!

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Source: https://docs.krita.org/en/tutorials/flat-coloring.html