A hyperrealistic 3D model of a Victorian-era diving helmet, but instead of glass, the faceplate is a swirling nebula of stars and galaxies. The helmet rests on a weathered wooden table in a dimly lit steampunk workshop, tools scattered around. Light from the nebula spills out, casting an ethereal glow on the surrounding objects. The overall color palette is dark blues, purples, and antique gold, with intricate details and textures, rendered in 8k resolution, a true masterpiece.