**Brushstroke shape and direction – Position C (Starry Night vs. Tree Oil)**
This page compares the brushstroke shape and movement direction in Position C from *The Starry Night* (1889) to matching zones (C and E) in the Tree Oil Painting. In all samples, the brushstroke forms show angular parallel structures, with overlapping grooves pulled diagonally in consistent directions. The gesture suggests the same underlying brush control behavior.

🌀 *Observation: Spiral-like force and groove layering align across paintings.*