1. Observe the highlight area: first observe the area formed on the jewelry surface after the light source is reflected, and the highlight part will be brighter and smoother.

2. Focus on the edge: highlights will appear on the edge of jewelry, that is, light will directly hit the corners of jewelry.

3. Capture the direction of the light source: Knowing the position and direction of the light source is helpful to capture the highlights and key areas of jewelry.

4. Visual effect processing: In the actual hand-drawing operation, you can use depth and color contrast to highlight the highlight area, and pay attention to the consistency between the hand-drawn material rendering and the physical appearance.