The young boy stands boldly in the lush jungle canopy, his eyes surveying what lies below. His dark hair has been tied at the back of his head, leaving his muscular chest exposed and adorned with a loincloth fashioned from the skins of animals. His left hand grasps tightly onto a liana vine, while his right hand wields a powerful spear, the point of which is pointed downwards. Taking in the sight of the unknown below, the boy is ready to anything that awaits him.
Given the theme of this scene, I think that shading with earth tones would have the most impactful effect. For the boy's skin, use a warm brown shade. The liana vine could be a vibrant green, the spear a silvery gray, and the loincloth a mix of tans and browns. To add more texture, use darker greens for the foliage. To bring the boy to life, give him brown eyes and rosy cheeks. Finally, use white and gray washes to add more depth and shadow.