A hyper-realistic fantasy troll stands in an enchanted forest, its gnarled skin covered in intricate, moss-like patterns, illuminated by the soft glow of bioluminescent plants. The troll's eyes are deep-set, reflecting a mysterious wisdom, while its hulking form is captured with octane render precision and unreal engine clarity. The scene is richly detailed, showcasing each hair and tusk with HDR vibrancy against a mist-laden, ethereal backdrop. The composition is framed in an arresting 9:16 aspect ratio, emphasizing the towering, awe-inspiring presence of this mythical creature.