The painting illustration has the author’s subjective consciousness. It has a free-form personality. Whether it is fantasy, exaggeration, humor, emotion or symbolic emotion, it can be expressed freely.
As an illustrator, you must complete the theme of advertising creativity and have a deeper understanding of things in order to create excellent illustrations.
In short, illustrations are now very common, and anyone can be an illustrator, but if you want to draw a good illustration, you still need a lot of learning.