12. Use Color Fill for the Undercoat

It’s convenient to color each part separately, so that you will be able to easily change selections and use them as clippings later. At that time, it’s acceptable to use the Brush tool and the Eraser tool, but if there is an area enclosed by a line then you can fill it in completely with the Flood Fill tool.

An area like this that is enclosed in solid lines can be filled in using the Flood Fill tool. Next we’ll add a layer for an undercoat.

Open the layer window and tap the ①“+” button to add a new layer for an undercoat. Next, tap the ②Added layer to make it active.

The undercoat layer is beneath the drawing. You may change the order of the layers by dragging the ①Thumbnail image.

Tap the Bucket button on the ①Tool Selection window and select the ②Flood Fill tool.

Tap the button to open the Flood Fill Properties window.
The fill will take the transparency level and color of the starting point and fill in everything with a solid color, including changes in color within the specified range. If you would like to use the line drawing layer as an edge then please select ②Opacity as the Edge. Also, if you would like to use the fill layer or a photo as the Edge then please select Color as the Edge. If you would like to use the illustration as the Edge then press ①Opacity here. The strength percentage determines the amount of color change from the start point will be included before it is considered an edge. If you select 0% then only the exact same color will be filled in. If you select 90% then, for example, if the starting point transparency is 100% then everything between 100% and 10% opacity will be filled in. If you select 100% then the entire layer will be filled in regardless of opacity. Here we will set the opacity to a ③Strength of 60%.
Next we will select the Current Layer to make it a Reference Layer and then fill in the Current layer.
When Specific layer is selected, the layer selected below becomes a reference layer and the Current layer is filled in. If Canvas is selected then the combined layers below are treated as reference layers and the Current layer is filled in. Here we want to use the line drawing as a reference and fill in the Current layer, so we select ④Specific layer, then tap the ⑤layer row and select the line drawing layer.

Select a color from the Color window. Here we select the ①Hue Thumb and ②Saturation Thumb and drag them to select a skin-tone color.

Now let’s fill in the skin color. Tapping inside the line drawing will fill in the entire area. If there are leaks or the entire layer is filled in then press the Undo button (Go back one step).

The figure above shows how the skin and shoe color has been changed with the Flood Fill tool.

The figure above shows the difference between a strength setting of 10% and 90%. You can see how a stronger setting leads to more area being filled in. If there are gaps between the fill and the lines then increase the strength as much as possible. Also, expantion it can decrease the number of gaps.
I believe it’s difficult to grasp the fill settings. We often hear people say, “I can’t use the Flood Fill tool because it is buggy. It always fills the entire canvas.” but if you don’t understand it yet, try setting the Edge to Color 10% and the Reference Layer to Canvas and you should achieve the desired results. Also, the Easy Settings often allow one to use the Flood Fill tool accurately, so if you don’t quite understand the setting yet then turning on “Easy Settings” may help.

After successfully filling in the layer window it will look like this when opened. ① is the line drawing layer, ② is the undercoat fill layer, and ③ is the rough sketch layer . Once the undercoat is complete you can easily turn that area into a Clipping Path or select it with the Magic Wand.


  1. Introduction
  2. Let's Take a Look at Some Sample Artwork
  3. Start Creating an Artwork
  4. Toolbar and Tool Selection
  5. Do Your Draft Sketch by Hand
  6. About Layers
  7. Let’s Trace
  8. Undo and Eraser
  9. Fine Tuning Using the Lasso tool
  10. Check by Reflecting Horizontally
  11. Select Colors in the Color window
  12. Use Color Fill for the Undercoat
  13. Making a Selection with the Magic Wand
  14. Making a Gradation (Shading)
  15. Quick Color Picker Function
  16. Create Highlights and Shadows
  17. Paste a Texture
  18. Let's Merge Layers
  19. Sign Your Artwork
  20. View Your Artwork
  21. Post Your Artwork
  22. Share Your Artwork
  23. Remove-Ads Add-on
  24. Add Color to the Analog Image using Multiply
  25. Selection Layer
  26. Let’s try using Screentone
  27. Clipping is convenient
  28. Changing the color with Alpha Lock
  29. Save Layer as Transparent PNG command
  30. Save Canvas as Transparent PNG command
  31. Naming your layers to manage them
  32. Putting texture to the floor with Perspective Form
  33. Skirt with Mesh Form
  34. Entering text with Text tool
  35. Creating manga with Frame Divider tool
  36. Enlarging the canvas with Canvas Size
  37. Cutting off the canvas with Trim
  38. Canvas creation with resolution (dpi) specification
  39. Changing image resolution with Resize
  40. Texture with Material tool
  41. Straight Ruler
  42. Circular Ruler
  43. Elliptical Ruler
  44. Radial Ruler
  45. Mirror Ruler
  46. Kaleidoscope Ruler
  47. Array Ruler
  48. Stabilizer
  49. Straight line with Drawing tool
  50. Cut, Copy, Paste
  51. Filter: Brightness & Contrast
  52. Filter: Hue Saturation Lightness
  53. Filter: Color Balance
  54. Filter: Extract Drawing
  55. Filter: Change Drawing Color
  56. Filter: Mono Color
  57. Filter: Gray Scale
  58. Filter: Black & White
  59. Filter: Posterize
  60. Filter: Gaussian Blur
  61. Filter: Zooming Blur
  62. Filter: Moving Blur
  63. Filter: Mosaic
  64. Filter: Stroke (Both)
  65. Filter: Stained Glass
  66. Filter: Wet Edge
  67. Filter: Glow (Inner)
  68. Filter: Stroke (Outer)
  69. Filter: Drop Shadow
  70. Filter: Parallel Gradation
  71. Filter: Concentric Gradation
  72. Filter: Radial Line Gradation
  73. Filter: Sphere Lens
  74. Filter: Blur Frame
  75. Switching devices / transferring data with Dropbox
  76. Switching devices / transferring data with SD card on Android
  77. Switching devices / transferring data with PC on iOS
  78. Configuration window details
  79. Flood Fill tool details
  80. Blend mode details
  81. How to upload transparent PNG onto Twitter
  82. Notes About Tracing