Dragon head sketch pencil drawing

First overall composition, can not be fixed first drawing that part of the sketch steps are as follows:

1, the first step is the conventional composition positioning.

2, the second step is to draw the large external shape and the main structure, in this step the drawer should use lighter lines to draw the shape and the main structure.

3, the third step is to lay out the large light and dark tones.

4, the fourth step is to deepen the carving, deeper carving is the subtle changes in the light and gray surfaces and the reflections of the dark surfaces are carefully expressed.

5, the last step of the steps is to adjust and complete the picture.