Is this starry sky painted with gouache? How to draw? What should I pay attention to? Art students seek great education.

Brush the back of the card paper first, then draw the red and blue constellation polymer of the nebula, and then decorate the cluster with a trembling pen. During this period, the luminous star halo can be rendered by meticulous painting, which is generally a very laborious thing. This kind of picture is synthesized by PS, and it is more direct to draw on the computer.