This illustration enters the series of sketch exercises. Here are the steps for creating this sketch from a 3D skull rendering :
This is the rendering image that served as the basis for the sketch.
![Rendu 3D crâne pour entrainement](https://lady-melusine.com/wp-content/uploads/2018/01/rendu_crane.jpg)
The first step lays the big bases of the sketch, with a pretty big brush.
![Digital Painting Croquis Crâne 01 Lady Melusine](https://lady-melusine.com/wp-content/uploads/2018/01/Exercice-croquis-crane-LM-etape_01.jpg)
The second step specifies the shapes and different parts of the object.
![Digital Painting Croquis Crâne 02 Lady Melusine](https://lady-melusine.com/wp-content/uploads/2018/01/Exercice-croquis-crane-LM-etape_02.jpg)
The third step is the longest, the realization of all the little details. In addition I have delimited the gray areas because the sketch is used for an exercise of values thereafter.