Grayscale depth map, 2D profile view of two dirtbikes racing through a high-altitude pine forest. The sun is low on the horizon, creating a silhouette effect with extreme depth layering. Detailed tire treads, engine components, and pine bark textures. The mountain range in the distance is rendered in soft gray gradients to create atmospheric perspective. High contrast, sharp edges, optimized for CNC and fiber laser engraving on metal. No blur, no smudging.