Dark chocolate cake with raspberry and blackberry garnish

3D render employing dramatic chiaroscuro lighting against deep blue-black background. Ganache-frosted round cake features glossy dark chocolate drip coating vertical sides. Surface sprinkled with brown cocoa crumb texture. Crown of fresh raspberries and blackberries arranged atop matte ganache layer. Specular highlights define geometry; scattered berries positioned surrounding base. Color palette dominated by magenta-pink berry hues against charcoal cake surface. Atmospheric depth created through directional side lighting and shadow gradation.