anatomical brain 3d model

Create a highly realistic, anatomically accurate 3D human brain closely matching the attached reference image. The brain must be clearly divided into two distinct hemispheres with a visible central longitudinal fissure running from front to back. Show realistic gyri and sulci with correct depth and density. The brainstem must be positioned at the posterior–inferior end of the brain, emerging from the underside and rear of the hemispheres (not the center), extending downward naturally with visible midbrain, pons, and medulla. From a front-facing or three-quarter view, the brainstem should remain partially visible beneath the hemispheres. Include a correctly proportioned cerebellum at the back. Ensure accurate scale: hemispheres not oversized, stem not undersized. Medical-grade realism, high-poly, no abstraction or stylization.