**Stroke-width overlay test – Tree Oil vs. Sunflowers (1888), Position 1**
This image overlays the measured stroke patterns from the Tree Oil Painting onto the vase section of Van Gogh’s *Sunflowers* (1888). Transparency adjustment was applied to match the underlying grooves. Stroke widths in both works fall within similar ranges (0.60–1.00 cm), and the orientation of the stroke ridges aligns in both direction and pressure groove. This analysis supports the hypothesis of shared brush control characteristics.

🎥 [Watch brushstroke overlay comparison](https://www.youtube.com/watch?v=WbQ_z_m6x-g)