Line drawings may seem straightforward, but you can achieve a lot with some practice and attention. “You have to evoke the transition from dark to light with either crosshatching or line weight, heavier lines being more in shadow, lighter lines indicating that the light source is hitting that side of the object,” says comic artist Jonathan Case. “Managing light and dark and conveying dimension is important to master,” says Case. “You have to know how to describe an object in detail in order to describe it with very little detail. That’s the main draw of line art. It can help you communicate form in an efficient manner.” 

Digital line art of huamn and pets.