Generate a series of immersive 4K landscape images capturing the breathtaking beauty of the Mongolian grasslands. Focus on hyperrealistic details in the grass, terrain, and distant horizons, achieving a photorealistic quality. Employ HDR techniques to enhance the dynamic range and vividness of colors. Ensure the rendering reflects the play of light and shadows across the expansive landscape. Utilize Unreal Engine v5 for a seamless blend of 3D rendering and high-resolution professional photography, delivering a UHD visual experience that transports viewers to the heart of Mongolia's picturesque grasslands

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