How to use the correction layer

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夜鼠

夜鼠

Introduction

Hello, this is rat night. Thank you for reading this article!

 

In this article, I would like to explain each function of the correction layer in detail using actual illustrations.

 

I hope you can see it till the end!

What is a correction layer?

In Crysta, you can change the brightness, vividness, and tint of an illustration by calling it color correction.

 

The general method is to directly adjust the layer or image on which the illustration is drawn, but if you do so, you will not be able to freely return it when you want to return to the state before adjustment.

 

However, if you use a method called "non-destructive editing", you can perform adjustment work without directly modifying the original data such as the target layer or image you want to adjust, so you can return to the state of the original data before adjustment. I will.

 

The correction layer is a function for performing the "non-destructive editing".

Applicable method

Select any item such as "Brightness / Contrast" or "Hue / Saturation / Brightness" from "Layer"-> "New Color Correction Layer", and adjust and apply the values.

 

Then, a correction layer is created, and the correction applied earlier is applied to all layers below the correction layer.

 

If you want to apply the correction to only a part, there are the following methods.

(1), Clipping mask: Only one layer is corrected, and only one layer other than the clipping source layer is corrected. Clipping mask can be applied from the icon in the red frame.

 

②, Put in a folder ... You can apply corrections to multiple layers at once, and even if the layer is below the correction layer, the correction will not be applied if it is outside the folder.

 

(3) Apply a clipping mask to the folder ... The effect is the same as (2), and the correction is applied only to the layers in the clipping source folder.

 

 

From here, I would like to explain using illustrations.

This time I will use this rose illustration

Assuming that this will be used as a material for multiple illustrations, I will change the background color and usage situation and process it so that it fits in with it.

Brightness / contrast

First black background

 

It's not so bad as it is, but I would like to use the "brightness / contrast" of the correction layer to create a dramatic atmosphere.

Select "Brightness / Contrast" from "Layer"-> "New Color Correction Layer".

 

Then, a new correction layer will be created on the selected layer, and a pop-up like this will be displayed.

 

There are gray bars for brightness and contrast respectively. Move the triangular point in the center of the bar to the right to increase the brightness of the illustration, and move it to the left to decrease it.

This time I lowered the brightness to -80 and raised the contrast to 40.

 

It's a darker color than the original rose.

 

However, as it is, it is more confusing than black, so use a layer mask to make further adjustments.

The part surrounded by the red frame is the layer mask.

Layer mask is a non-destructive editing function for cropping a part of an image.

 

If you select the part with the red frame and then apply the eraser on the illustration, that part will disappear, and if you delete the mask or put a color on the part with the eraser, the illustration will be displayed again.

 

By the way,

You can delete the mask by selecting the mask and dragging and dropping it into the trash can.

Click the icon in the red frame to create the mask.

 

This time, I wanted to create an atmosphere where the rose was in the spotlight, so I applied a soft eraser around the inner petals and the tips of the leaves.

 

In this case, since the correction layer is masked, the white part of the mask is corrected and the black part is the original image without correction.

 

Before → After

The illustrations are more familiar with the background than before the processing, creating a dramatic atmosphere as if the roses were shining light in a dark room.

Hue, chroma, lightness

Next is "Hue / Saturation / Brightness"

 

As the name suggests, you can change the color system, vividness, and brightness.

In the case like the image above, the color of the petals is changed because the color of the rose and the background are similar and the main rose flower is not conspicuous.

 

Select "Hue / Saturation / Brightness" from "Layer"-> "New Color Correction Layer".

Hue-140, Saturation 60, Brightness -10.

 

Then it became a dark blue petal.

However, the colors of the leaves and stems are strange, so use a mask to prevent them from being affected by hue correction.

 

With this, the stem becomes a bright blue rose that does not feel strange, and there is a difference from the background.

Harmonization

Next is toning.

 

Gradation is a numerical value that indicates how many levels the shade of color can be expressed when displaying an image on a computer.

The larger the gradation value, the smoother the image can be expressed.

 

Select "Tone" from "Layer"-> "New Tonal Correction Layer" and adjust the values to get the following.

Original image → 20 → 15 → 10

5 → 4 → 3 → 2

The number of colors decreases as the number of gradations is lowered, and 2 is the lowest value.

 

The change from 5 or less is remarkable.

 

When it is up, it looks like this.

You can create an illustration with an atmosphere like a dot game by using the gradation as a whole, or you can use it as an accent by lowering the gradation of only a part of the illustration.

Inversion of gradation

Next is the inversion of the tone.

 

Apply "Invert gradation" from "Layer"-> "New color correction layer".

Then, the white part changes to black, and the colored part changes to the opposite hue to the original color.

 

I don't think there are many situations where it can be used, but the colors are unfamiliar, so you can create an impressive screen.

 

Level correction

Next is level correction.

 

Select "Level Correction" from "Layer"-> "New Color Correction Layer".

Slide the black triangle point in Input to the right to adjust the dark part of the image, and slide the white triangle point to the left to adjust the bright part of the image. You can adjust the middle brightness by adjusting the gray point in the middle to the left and right.

 

Slide the black triangle point in Output to the right to determine the minimum darkness of the entire image, and slide the white triangle point to the left to determine the maximum brightness of the entire image.

 

Here is the one that was actually adjusted ↓

← Adjust the black point of the input Adjust the white point of the input →

Adjust the gray points of the input left and right

← Adjust the white point of the output Adjust the black point of the output →

 

 

You can also select a channel and adjust only the colors of red, green, and blue.

 

You can use these to adjust the image to the brightness you want, such as adjusting the output and then the input.

Tone curve

Next is the tone curve.

 

The tone curve allows you to adjust the brightness of the illustration.

 

Select "Tone curve" from "Layer"-> "New color correction layer".

As with level correction, you can select the item you want to adjust from the channel.

This time, let's adjust the whole as RGB.

 

You can adjust the brightness of the image by changing the shape of the lines on the graph.

 

The horizontal axis of the graph shows the brightness of the original illustration, and the vertical axis shows the adjusted brightness.

Pull the graph down to darken the image and pull it up to brighten it.

 

This time, I adjusted the originally bright part to be brighter and the dark part to be darker.

The contrast has increased and it has become a bright rose.

 

Since you can arbitrarily increase the points for controlling the graph, you can also fine-tune the channel selection.

 

It's a little difficult to adjust until you get used to it, but I think you can make more intuitive adjustments than level correction.

Color balance

Next is color balance.

 

As the name implies, color balance is a function that adjusts how colors are balanced.

It is often used to remove colors when they are unintentionally biased, such as when a photo or illustration is reddish or bluish overall.

 

Select "Color Balance" from "Layer"-> "New Color Correction Layer".

You can adjust the amount of each color with the slider in the "Color Balance" frame.

The "tone balance" manages the colors of the dark, middle, and brightest areas, respectively.

 

When the following adjusts only the halftone

When the following adjusts only the shadow

If the following adjusts only the highlights

In the above, shadows, neutral colors, and highlights are adjusted individually, but you can also adjust them at the same time by switching the tone balance.

 

Since you can add color in this way, if you want to remove the bluish tint, you should adjust it by adding more yellow.

Binarization

Next is binarization.

 

Binarization is the conversion of an image into a white-black binary tone.

 

Select "Binarize" from "Layer"-> "New Color Correction Layer".

Roughly speaking, the threshold value refers to the boundary value of how much white and how much black is in the illustration.

 

Changing the threshold will change the appearance, increasing the value will make it black and decreasing it will make it white.

 

1 → 255

 

Since there are no neutral colors, the image quality will not be affected when scaling is performed.

 

Therefore, when you absolutely have to increase the size of the illustration, you can increase the size of the line drawing without blurring by binarizing it and then enlarging it. After enlarging it, lightly blur it to make it fit a little.

Gradient map

Next is the gradient map.

 

Gradation map is a function that allows you to replace the colors according to the brightness in the image.

 

This time I will practice with this image.

Select "Gradient Map" from "Layer"-> "New Color Correction Layer".

A pop-up like this will appear, so double-click your favorite gradient from the "Gradient set".

 

Then like this,

The color on the left side of the gradation map is applied to the darkest color in the image, and the color on the right side is applied to the brighter colors in order. You can easily change to various shades by setting the gradation map.

 

This time, I applied a gradation map to the color illustration, but since the colors are arranged by light and dark, it can also be applied to grayscale illustrations like the Grisaille method.

Clip Studio Paint comes with several gradient maps by default, so you can easily create an illustration like this thermography, or you can apply the gradient map to the whole and change the transparency and compositing mode of the correction layer to make the whole illustration. It is possible to give a sense of unity to.

 

You can create the gradient map yourself, or you can add it from "Find Material" in Clip Studio.

You can easily change the atmosphere of the illustration, so please give it a try.

Changes after application

So far, we have introduced the functions of the correction layer.

However, there are cases where it is applied once, but it is still a little different.

However, it is troublesome to erase the correction layer and apply it again.

 

In such a case, please double-click the red frame part of the image below.

Then, the pop-up will be displayed again, and you can change the value of the correction applied once without recreating the correction layer.

Finally

This is the end of the introduction of the correction layer functions.

 

Thank you for reading to the end.

I hope this article will be useful to those who have read it.

 

Personally, I think that the correction layer is indispensable for drawing illustrations digitally. By combining multiple correction layers, you can find effects and shades that you couldn't think of, so please use them!

 

See you in another article!

 

Night mouse

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