Here, I will paint the rough draft with the base colors. I will also decide on the overall color scheme and direction at this stage.
 Organizing folders for each part
Before creating new layers under the rough draft and painting the base colors, I will put each part in a folder to make future management easier.
I select the “*Foreground” layer and click [New Layer Folder].
I drag the “*Foreground” layer to the layer folder and rename the folder as “Foreground”.
I repeat the same procedure for all other parts.
 Painting each part
Although I managed all lines on one layer, I expect many changes while painting it, so I will divide the coloring layers.
I start with the character.
Below the “*Character 1” layer inside the “Character1” folder, I create a new layer and change the layer name to “Skin”.
I select the “*Character 1” layer. Then, I click the [Reference layer] button, and set the rough line art as a “Reference layer”.
[Reference layer] is a layer setting that allows you to fill and draw on other layers while only referring to a [Reference layer].
For detailed information, please refer to the following.
I select the “Skin” layer and then choose [Fill] tool > [Refer only to editing layer] from the [Tool] palette.
I also enable [Multiple referring] > [Reference layer] from the [Tool Property] and add the skin color on the face, hands, and feet.
For parts that overflow or cannot be filled with the bucket tool, I use the “Darker pencil 2” to add colors.
I keep in mind the order of the layers and apply the same method to parts such as hats and clothes, painting them on different layers.
For other characters and the bottle, I paint the color for each part while dividing the layers in the same way.
For the parts outlined in red below, I add color only with brush tools because the lines are faint and the boundaries are less clearly defined.
Since there are many elements to the illustration, I use a lot of layers. However, it is important to keep the file organized so that I can easily make changes later if I need to.
 Adjusting the colors
Once I finish painting the entire canvas, I change the colors of some parts.
Character 1’s clothes are blending in with the green of the background, so I change the color to black.
I turn on [Lock Transparent Pixel] and use the brush (opacity: 100%) to paint the “Sleeves”, “Clothes”, and “Undershirt” layers inside the “Character 1” folder.
After changing the colors, I turn off “Lock Transparent Pixel”.
I also moved the character up in the layer order using the [Move layer] tool to align the character’s position with the rock.
Now I’ve decided the overall color scheme.