I recorded the process of making the cover, so I made a making of the cover.
1) Rough sketch
2) Pen insertion
3) Base paint
4) Shadow (solid coloring in anime style)
5) Shade painting
Paint over the break area, or paint the intermediate color on the border.
6)Blur the shade and shadow
7)Hair painting + temporary background
The background was rendered by another 3D software and brought to me.
8)2 Shadow painting
Paint dark shadows in the shadows or in the areas hit by AO (Ambient Occlusion).
(9) Drop shadow painting
10)Add reddish tint
Fluff the upper part of cheeks and boobs.
11) Rim light (Fresnel reflection)
Add light to the contours and edges.
12)Highlight
13)Finish
Finish by drawing in effects and screen gradations from the direction of the light source!