What is the drawing technique?

Question

Design

Greetings.
In the upper dark part, everything is marked with some kind of connecting stripes and darkens towards the edges. How to do it? Are there tutorials/explanations on this topic or just by eye?

Answer 1

If you are talking about the background, then this is a polygonal mesh. You can do it by hand, but it's slow, you can use a generator, like this .

Answer 2

I think I saw something similar in editors