What actually matters for this format
A visual meant for a fast-scrolling feed needs to be understood in a fraction of a second: a clear subject, simple composition, colors that pop. Generation speed matters too, so you can produce several variants and keep the best one without burning time on a single visual.
The right format comes first
Generating directly at the right ratio (portrait 4:5 for a post, vertical 9:16 for a story, Reel or TikTok) avoids a crop afterward that often cuts off the main subject. Specifying that ratio in the starting prompt is more reliable than cropping an image generated in a different format.
Which engine to favor
For this pace of production, a fast-to-iterate engine like Grok Images works well for exploring several directions, with Nano Banana to quickly adjust one detail without regenerating everything. For a visual that later needs to scale up (a banner, a display ad), running it through Magnific for upscaling is still worth it. To see how these engines compare to each other, check our comparison Nano Banana, Grok Images, Magnific.
Frequently asked questions
Vertical (4:5 for a post, 9:16 for a story or Reel) takes up more screen space and is generally favored — but check the target format before generating, since cropping afterward often cuts off the main subject.
It depends on the account and the audience, but a visual that stands out (bold colors, a clear subject, simple composition) often performs better than a highly refined realistic render that gets lost in a fast-scrolling feed.
Go further
- AI image generation: the complete guide
How AI image generation actually works, which use cases to target, and how to choose between upscaling, prompt-based generation and editing.
- How to translate a video into another language with an AI voice?
The complete method for adapting a video into several languages: extracting the script, translating it, generating the voice, and re-syncing lip movement if needed.
- AI voice or human voiceover: what's the difference for a professional video?
Where AI wins by a wide margin (cost, turnaround, revisions), where human voiceover keeps a real edge, and how to decide based on your project rather than on principle.
- Free or paid AI video generator: which one should you start with?
What free plans actually limit (watermark, duration, quota), and at what point a subscription becomes more cost-effective than stacking free accounts.
See exactly what ToolAcces includes — credited API engines and mutualized access, in a single subscription starting at €39.99/month, no commitment. View pricing.