A towering fantasy troll with rugged, textured skin stands amidst an enchanted forest, captured in photorealistic detail. The scene is rendered with octane precision and harnesses the power of Unreal Engine, showcasing hyper-detailed features like glistening moss on its back and expressive, intelligent eyes. The environment is bathed in HDR lighting, with sunlight filtering through dense foliage, casting dappled shadows on the troll's muscular form. The troll's attire, made of tattered natural fibers, complements its ancient and mystical appearance. This vertical composition captures the essence of a mythical creature, blending realism with a touch of magical whimsy.