1= form and light
2=depth
refer to these websites for more info on both illusions
1- thevirtualinstructor.com/hatchingcrosshatching.html
2- www.udel.edu/artfoundations/beg_paintingtechniques.html
Answer:
waste oooof fassshhiioonn
I have experience with music a lot but I can't answer it its not easy sorry