入佐芽詠美 | Irisa Chiemie

Use Photoshop
The process of adding texture to a drawing is called special effects (retouching)

CAROLE & TUESDAY, Godzilla Singular Point, Kabaneri of the Iron Fortress
Data on the making of the special effects before and after work

The image of the car was created as a sample for special effects.

The image above is after the special effect.
The lower image is before the special effect