Shadow Entity in an Oil-Painted Starship

An ethereal shadow creature rendered as an oil-painting inside a dim retro-futuristic spaceship corridor. The creature is formless and smoky, with shifting tendrils and faint glowing eyes that blend into the dark metal walls. Thick impasto brushstrokes create texture and depth. Dramatic tenebrism with stark light from a starship viewport casts blue-black shadows across riveted panels and a chrome console. Outside, stars and a nebula glow; the shadow coils around cables near the floor, leaving a wavering, distortive trail. Color palette: midnight blue, iron gray, black, with copper highlights and icy white. Mood: eerie, mysterious, and otherworldly.