CG artist's toolkit- drawings

We are asked to sketch each other faces with continuing lines without looking at our sketchbook, It was challenging at the beginning because we used to draw as what in our brain's memories and not observing most of the time. And through these practice, we are training our eyes to be our pencil and it was really fun and surprised. After that we were spending 30s, 1and 2 minutes sketching with a quick and energetic lines ,presenting the moment and the forces.