Frog on Moss Beneath the Northern Lights

Ultra-detailed photorealistic 3D render of a small green frog perched on a mossy rock in a still alpine lake at night, beneath the northern lights. The frog's skin is moist with fine texture, subtle color variations, and a wet gleam; large glassy eyes with bright catchlights. Surrounding water is calm and reflective, with gentle ripples and soft reflections of the aurora; mist hovers above the surface. The sky is alive with the aurora borealis in emerald, turquoise, and purple ribbons that cast a cool glow onto the frog and moss. Volumetric light rays, subtle fog, and convincing caustics on the water are used for realism. The scene is framed from a low angle, close to the frog (roughly a 50mm perspective), with a shallow depth of field so the frog is in sharp focus while the distant pines fade into bokeh. Style is cinematic, hyper-realistic, using physically-based rendering (SSS on skin, accurate reflections, and light scattering).