Here is a small recurring humiliation of being a PM. You finish a feature, you write the launch page, and then you need one image: your app, on a device, looking nice, with room for a headline. It is not a real design task. It is a polished placeholder. But our design team was, correctly, busy with actual design, so my request would sit in their queue, and I would wait three or four days for a hero image I needed before the launch meeting that was happening tomorrow. I have shipped launch pages with a gray rectangle and the alt text 'image coming soon.' More than once.
The fix that took five minutes
The Generate a Hero Screenshot Mockup for a Product Launch Page prompt is built for exactly this gap. The body is a full generation prompt with the parts that actually matter baked in: a device floating at a three-quarter angle, the product UI on screen, soft studio lighting, negative space on the left for a headline, and crucially a long avoid list. I filled in the variables: device was 'a modern smartphone,' the UI description was 'a clean analytics dashboard with a line chart and three metric cards,' palette was our brand's deep blue and warm white, mood was 'calm and trustworthy,' aspect ratio 16:9. I ran it on GPT Image 1.5 because it is genuinely good at clean, photoreal product shots with believable UI.
The first result was 80 percent there in one shot. Believable phone, soft lighting, real-feeling dashboard on the screen, and actual empty space on the left where my headline would go. For a placeholder hero on a launch page, 80 percent in five minutes beats 100 percent in four days, every single time.
I learned the hard way that the negative-space instruction is doing quiet, heavy lifting. The first time I tried to generate a launch hero, months earlier with a worse prompt, the model would dutifully center the device and fill the entire frame, leaving me nowhere to put a headline without slapping text over the product. This prompt explicitly pushes the device into the right third and reserves the left for copy I add later. That one compositional rule is the difference between an image I can use and a pretty picture I have to throw away. Composition, it turns out, is most of what separates a usable marketing asset from a screensaver.
The avoid list is the whole game
If you have generated product mockups before, you know the failure modes. The model loves to render melted, warped UI and confident gibberish text that looks like a ransom note. The reason this prompt works is that its avoid list is specific and hard-won.
- It bans warped and melted UI elements, which is the number one way an AI product shot screams 'fake.'
- It tells the model to render legible button shapes only and no real text, because fake paragraph text is always garbage, so I add the real headline myself afterward.
- It forbids extra floating devices, because for some reason these models adore spawning a phantom second phone in the corner.
- It kills lens flare, neon oversaturation, and cluttered background props, the three things that turn 'premium' into 'stock photo from 2009.'
Where I still loop in a real designer
I want to be honest about the ceiling. This is great for a launch-page hero, a blog header, or a social card. It is not great when the exact pixels of our real product UI need to be on screen, because the model invents a plausible dashboard, not our dashboard. For our biggest launches, where the UI itself is the story, I still take a real screenshot to design and let them composite it properly. But that is maybe two launches a year. The other twenty, this prompt is the difference between a polished page and a gray rectangle.
A small tip if you try this: the aspect ratio variable is more important than it looks, so set it deliberately rather than defaulting. I generate the 16:9 version for the launch page hero, then re-run the exact same inputs at a square ratio for the social card and a tall ratio for the in-app banner. Because every other variable stays fixed, the three assets feel like a matched set instead of three unrelated images, and the device, lighting, and palette stay consistent across all of them. That consistency is the thing that makes a scrappy, self-served launch actually look intentional.
My actual workflow now is to generate three variations by swapping the mood keyword, calm, then bold, then playful, drop all three into the launch doc, and let the team pick in the meeting instead of waiting for the queue. If you are a PM who keeps getting blocked on one nice-enough image, grab the Generate a Hero Screenshot Mockup for a Product Launch Page prompt on Prompt Dock and run it on your next launch. I pair the image with notes from my Rewrite a Technical Changelog into Release Notes Customers Actually Read prompt so the visual and the copy ship together, on time, for once.