**Brushstroke analysis – Self-Portrait 1889 vs. Tree Oil Painting**
This image shows the measurement zones used to compare brushstroke directions, widths, and flow patterns in Van Gogh’s *Self-Portrait* (1889) and the Tree Oil Painting. Each red circle marks a region where both single and grouped strokes were evaluated. Similar torque angles and stroke rhythms were found — particularly in the swirling background behind the head and upper shoulder.

📍 Reference image: [Self-Portrait 1889 – Google Art Project](https://artsandculture.google.com/asset/self-portrait/9gFw_1Vou2CkwQ)