What happens if grain lines remain straight on a wooden cylinder instead of curving with the surface?

Correct answer: The texture will appear flat and the cylinder's volume will weaken

The governing concept is that surface texture must follow the perspective and curvature of the form beneath it. On a cylinder, grain lines should bend or wrap around the curved surface. Keeping them straight makes the texture read like marks on a flat plane, weakening the sense of roundness and volume. It does not automatically make the wood shinier, improve the shadow, or darken its local tone.