Blank Billboard Mockup with Metal Catwalk

Generate a hyper-realistic image of a large, outdoor billboard structure with a blank white advertising surface, situated on a sturdy metal catwalk and supported by a thick, cylindrical metal pole. The billboard is positioned at an angle, facing slightly to the right, with a sleek, modern design featuring a metal railing along the catwalk's edge and four spotlights mounted on top. The background should be a transparent, gray and white checkered pattern, indicating a PNG image with alpha channel. The overall style should resemble a high-end design editorial or campaign photograph, with realistic lighting, natural shadows, detailed textures, and accurate mockup construction. Incorporate a sense of industrial chic and urban landscape, with the billboard standing out as a prominent feature. The image should be devoid of any watermarks or logos. The lighting should be soft and diffused, with subtle shadows cast by the billboard's structure and the surrounding environment. The textures should be highly detailed, showcasing the metal's roughness and the catwalk's grating. The color palette should be predominantly neutral, with shades of gray, white, and metallic tones. The composition should be balanced, with the billboard's angular orientation creating a sense of dynamic tension. The image should convey a sense of modernity, urbanity, and advertising presence.