What is the technique in making this?

>>2369528
wtf are you even talking about, be more specific

Probably isnt any answer and your just thinking itll somehow be easy

>>2369528
It's just simple linework on one layer, painted over on another (though it looks like they did it on paper, so no layers, but the principle is the same). The background is just a simple gradient.

There's nothing there that's particularly advanced.

It looks traditional to me, possibly colored ink with pen linework. If so so, contrary to what >>2369532 said, its pretty advanced because getting a smooth gradient like that in the back ground is very difficult.

>>2369528

This is a piece by the late Moebius, in case you missed the signature. In this piece he used a pen for the inks and watercolor for the colors. If you wish to replicate his style with digital media keep in mind there is a lot of subtle texture in the colors which you will miss out on if you use standard soft airbrushes and gradient fills.