How to Paint a Watermelon - Advanced Version of Shading a Sphere with Watercolor

1. Sketch the shape of watermelon and shade it as a sphere.

2. Start with the darkest area.

3. Make all the shaded areas dark.

4. Work on the reflected light and the shadow, too.
5. Work on the overall area with gray color to give 3D effect.

6. Highlight the darkest and lightest areas.

7. Start coloring from the lightest area.
The tone should vary in accordance with the darkness of the area.

8. As you go down from the lightest area, it should get darker.

9. Then it should get lighter near the bottom area. (for 3D effect)

10. Here's the most important part!
Use the darkest green and black at the darkest area.

11. The tone of stripes should vary as well. It gets lighter near the bottom area.

12. Hightlight the darkest area once again.

13. And it gets lighter as it goes up.

14. Use a variety of green colors to give a stronger 3D effect.

15. Let's add details to the stripes of the watermelon to make it look real.

16. Clear up the shadowed area and the watermelon is complete!