I will introduce how to finish the illustration with depth by adding one effect.

Example: Image size 600 × 440 pix

1Select the created illustration and execute 【Edit】 → 【Auto-Coloring】 → 【Full-Auto Coloring】.

2 will make the executed layer.

3 By changing the effect of this colored layer, you can create a profound change. It is interesting to try variously.

Example) Overlay 100%

 

Example) 35% hue

Example: Hard light 75%

Comparative reference