封面图 AI 图像提示词
Thumbnail prompts are built for a small rectangle that has to read at a glance, usually a video or social cover. Mapped tags are thumbnail, thumbnails, and YouTube thumbnail. The constraints are harsh: one subject, a high-contrast light, almost no fine detail, and type that is either absent or extremely short. A prompt written like a film still often fails here because the interesting part of the frame disappears at 320 pixels. Pages in this hub show how someone specified that simpler picture. Copy one when you are designing a cover and you want the model to leave space, not to fill every corner with atmosphere. Check faces and any words before you upload. This hub is indexed only when there are enough published covers to justify a landing page. A few examples remain available by URL and stay out of the sitemap. Pair a thumbnail with a model chip on the prompt page if you need to know which generator the wording was aimed at.
Japanese SNS Automation Thumbnail
Create a high-energy Japanese YouTube thumbnail / social media banner in a 16:9 widescreen format, using a dramatic black, white, and
Magical Girl AI Music Thumbnail
Create a bright, ultra-saturated anime YouTube-style promotional thumbnail for {argument name="brand name" default="Sousaku AI"}, in a
Cinematic Character Poster with Layered Depth
Design a high-end cinematic character poster in a layered depth composition (9:16 vertical) with a strong foreground–midground–background
Clean Modern YouTube Thumbnail
A clean modern YouTube thumbnail on a bright white background, split visually between bold text on the left and a cropped presenter on the
问题
What size should I generate?
The prompt describes the picture, not a pixel size. Export the crop your platform asks for after the image exists.
Should I put the video title in the prompt?
Only if you are prepared to fix the spelling. Many of these prompts avoid long titles for that reason.
How is a thumbnail different from a poster?
A thumbnail has to survive at a very small size. A poster can carry more layout and smaller type.