Verified against Flux · 2026-08-01
Design a scroll-stopping social graphic on Flux.2 with real reserved caption space
A platform-aware brief for a social campaign graphic on Flux.2 that reserves genuinely clean space for a text overlay added later in a design tool — achieved by describing the empty area explicitly, since Flux has no exclusion field to keep text or clutter out of it.
The prompt
Ready to copy — highlighted parts are example details you can swap.
FORMAT vertical 9:16 Instagram Story/Reels cover. Treat this as the actual canvas shape the composition will be judged against, not a loose suggestion. SCENE AND SUBJECT a barista's hands pulling a shot of espresso into a small ceramic cup on a marble counter, close and intimate angle BRAND ACCENT the cup's interior glaze in the brand's signature terracotta orange, the only saturated color in an otherwise muted frame LIGHT AND MOOD early-morning window light, soft and slightly cool, calm rather than energetic RESERVED SPACE Leave the top third of the frame, above the counter line genuinely uncluttered — no secondary object, no background texture busier than a soft gradient or blur in that specific region, nothing a headline or logo overlay would visually compete with once added afterward in a design tool. Describe this region as intentionally calm, the way a magazine cover leaves quiet space around its masthead, rather than simply hoping the composition leaves a gap. WHAT IS IN THE RESERVED AREA Since there is no negative-prompt field to tell Flux to keep that region clear, state it as a positive fact about the scene instead: the top third of the frame, above the counter line contains only a softly out-of-focus pale wall with gentle window-light falloff, no shelving or signage visible, and nothing else — no hands, no secondary product, no stray object drifting into that zone, no text of any kind. Flux frequently invents garbled pseudo-text on its own if a region reads as "sign-shaped" or "label-shaped," so avoid describing that area in a way that implies lettering belongs there. OVERALL STYLE muted, editorial café-brand aesthetic, shot on film, not glossy commercial lighting CONTRAST FOR TEXT LEGIBILITY Whatever fills the reserved region should sit at a fairly uniform brightness and a single dominant tone, not a busy mix of light and dark patches, since a designer will likely drop a solid-color or high-contrast text layer on top afterward and needs a predictable, even surface to place it against — a region that's technically empty of objects but wildly uneven in exposure is still a hard region to typeset over. SECONDARY CROP CHECK If this graphic might also get cropped tighter for a different placement (a square feed post pulled from a Story-format master, for instance), keep the main subject and the brand accent detail positioned so they'd survive a moderate center-crop too, not just the exact canvas stated above — describe the composition with that flexibility in mind rather than pushing every element to the very edge of the stated format. CHECK BEFORE FINALIZING Cover the reserved area with a plain rectangle in your head, or literally in a quick mockup, and read the rest of the composition without it — if the scene still feels complete and intentional with that region blocked out, the reserved space is working as a genuine compositional choice; if the frame suddenly feels like it's missing something without that area, the scene was likely composed around filling the whole canvas and the reserved region will fight the text placed on it later rather than support it. OUTPUT A single image at the exact vertical 9:16 Instagram Story/Reels cover canvas, with the top third of the frame, above the counter line clean enough that a headline can be dropped directly on top of it in Canva, Figma, or a similar tool with no additional cropping, blurring, or darkening pass required first.
Customize
Optional — swap in your own details for the highlighted parts above.
Why this works
Because Flux has no negative-prompt field, "keep this area clean" only works as a positive description of what that region actually contains — a softly blurred wall, not "no clutter." An instruction to simply leave space without describing what fills it reliably gets filled with something anyway, since Flux always renders every region as some content; it has no concept of intentionally leaving pixels undetermined. Naming the exact platform format changes Flux's framing instincts — a vertical Story crop composes differently than a square feed post — even though Flux has no --ar-style parameter at all; the canvas shape has to live in the prose as compositional information, the same way a photographer reads their sensor's aspect ratio before framing a shot, not as an instruction applied after the fact. Naming it up front avoids getting a strong square composition that then loses its subject once force-cropped to 9:16 later. The warning against describing the reserved area in text-implying terms targets a specific, well-documented image-model failure mode shared across most diffusion and flow-matching architectures: any region that reads compositionally as "sign-shaped" or "label-shaped" gets filled with illegible, garbled pseudo-text, because the model has learned that such regions statistically contain lettering. Avoiding that framing in the prompt is the only way to prevent triggering it. Finally, describing the reserved region as "intentionally calm" rather than simply empty gives Flux a completed target to render — a soft blurred wall is a finished compositional choice — rather than an absence it might read as unfinished and try to complete on its own initiative by adding detail, which is the more common failure when a reserved area is described only by what it lacks. The even-brightness instruction for that same region exists because "clutter-free" and "typographically usable" are not the same standard — a region with no objects in it can still be a poor place to set text if it swings from a bright highlight to a dark shadow across the space a headline would occupy, and a designer working from the output has no way to fix uneven exposure without a separate edit, so it has to be specified as its own requirement here rather than assumed to follow automatically from "uncluttered."
What you get back
A vertical Story-format image with the espresso-pulling close-up occupying the lower two-thirds, and the upper third showing only a softly blurred, warm-lit pale wall — clean enough for a headline to sit directly on top with no further edit.
Verified against
Flux Flux.2 · 2026-08-01
Changelog
- 2026-08-01 — Initial publish, verified against Flux.2 for platform-format framing and reserved negative space.
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