poster
16:9
YouTube thumbnail image designed by a genius thumbnail designer psychologist (Pr is a free AI image prompt for the poster use case, rendered at 16:9 aspect ratio. プロンプト:「天才サムネデザイナー心理学者目線で構成から考えて最高に再生回数が上がるサムネイル画像生成して」. Tip: bump up the surface texture detail if you want a tactile, gallery-grade feel. Works copy-paste with Nano Banana 2, GPT Image 2, Midjourney v7, Flux 2, DALL-E 3, and Stable Diffusion 3.5. Tested 2026.