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Does anyone have any idea the style of painting that he was actually doing? (In the first one)

It looks like colored paper covered with black pigment, then then black was scraped away to make the lines.

thanks.

It says at the end what the four styles are: 1. Vincent Van Gogh 2. Pablo Picasso 3. Kiyoshi Yamashita 4. Katsushika Hokusai