ultra-realistic 3D game asset of a two-headed hellhound with a muscular, hairless body. The creature should have dark, charred skin with detailed muscle definition, glowing red eyes, and jagged, sharp teeth. Both heads should display snarling expressions with smoke or embers rising from the mouths. Its body should be powerful, with strong limbs, clawed feet, and a long, sinuous tail emitting faint smoke. Focus on realistic textures, cracks, burns, and hellish lighting for a menacing look