Thank you Ricardo for sharing your process with us. Your work is very inspiring.
Here is my illustration of a water buffalo in some lake, among water lilies. It is based on a real event. I wanted a smoother result, with less pencil marks, I guess the type of paper I used did not help with that.
The hatching on the buffalo is to imitate their wrinkly skin. Though I created reflections, I was not too worried about getting a realistic effect.