It is said that learning China's calligraphy and painting can cultivate sentiment and cultivate self-cultivation. After all, China's paintings and calligraphy contain a lot of China's Confucianism.
I heard for the first time that learning sketch can improve moral character, and I didn't know how noble Van Gogh and Rodin were.
Learning sketch can really cultivate modeling ability and three-dimensional thinking. The cultivation of imagination is not cultivated by sketch training. Many children are born with a wild imagination, but with the increase of cognition, their imagination is bound by some rules. Many children can't draw those childlike paintings after passing the forbidden modeling training. I think the cultivation of imagination is more through the study of some design concepts.