Vertical-to-wide cinematic YouTube thumbnail, 16:9, ultra high contrast, mobile-readable. A massive ancient double door stands slightly ajar in dark misty void, blinding warm light exploding through the gap. Through the doorway a chaotic swirling collage of many different worlds is visible: storm-wrecked tropical island, blacked-out night city, desert villa, rainy abandoned amusement park, snowy village, ocean liner — layered like a portal vortex. A silhouetted human hand reaches toward the glowing crack, magnetic pull. Huge bold punchy hook text at top: 'CHOOSE YOUR WORLD' in thick white sans-serif with dark outline, extremely legible. Small show title lower area: 'Casting Open'. Tiny 'EP.1' badge. Saturated teal-and-orange color grade, dramatic god rays, simple uncluttered background, crisp focus, high CTR poster style.
