Highest Quality, 3D Render of a Sister of Battle from the Adepta Sororitas, from behind, looking back, short white hair, pale skin, blue eyes, beautiful face, scar, power armor, (big round ass), extremely detailed, complex background, dynamic composition, complex lighting, Unreal Engine, UE5, Ray Tracing, global illumination, atmospheric, realistic, gritty, highly detailed, captivating, ass focus, detailed textures, epic, visually stunning, physically based rendering