01 Core Formula
FLUX.2 responds well to clear, descriptive prompts. Name the subject, the visual style and the lighting, then add one or two scene details. Full sentences beat vague one-word lists.
1.1 The Basic Prompt Formula
Start with three required parts — subject, style and lighting — then add optional scene details. A coherent sentence gives the model more to work with than a scattered list.
[Subject] + [Style] + [Lighting] + optional [Background] [Detail] [Mood]
Subject
The main person, object or scene. Be specific: 'a tabby cat' beats 'a cat'.
Style
The visual treatment: photorealistic, anime, 1970s film still, studio product shot.
Lighting
Golden hour, softbox, neon backlight, overcast window light — light sets the mood fast.
Background
Keep it simple unless the environment is the point.
Detail
One or two telling specifics: texture, color accent, worn edges, shallow depth of field.
Mood
A single emotional word: serene, tense, playful, lonely.
Botanical Still Life
Prompt
A botanical still life of eucalyptus, dried pampas grass and a single pink ranunculus arranged in a matte ceramic vase. Soft natural window light from the left, pale linen backdrop, gentle shadows. Editorial product photography, muted earth tones, high detail.
Subject + style + light in one sentence. Preloaded in FLUX.2 Pro at 1:1 / 1MP / PNG — a cheap way to test composition.
1.2 Detail, Medium and Surface
FLUX.2 is good at material and surface language. Describe what something is made of and how the light hits it, and the texture usually follows. Max gives fine detail the most room to survive.
Oil Painting Landscape
Prompt
An oil painting of a misty mountain lake at dawn, pine-covered slopes reflected in still water, a small wooden rowboat tied to a weathered dock. Visible brushstrokes in the clouds, impasto texture in the foreground reeds. Warm ochre and cool teal palette, cinematic composition.
Preloaded in FLUX.2 Max at 16:9 / 2MP / PNG. The Max tier preserves brushstroke and surface detail best.
02 Canvas and Aspect Ratios
All three tiers share the same preset ratios plus a custom option. Pick the ratio for the publishing channel: 1:1 for feeds, 9:16 for stories, 16:9 for widescreen, 21:9 for cinematic banners.
2.1 Choosing a Ratio
FLUX.2 exposes 10 preset ratios plus a custom mode. When the channel is flexible, let the subject decide — tall subjects read better in portrait, landscapes in landscape.
Cinematic Wide Banner
Prompt
A panoramic sci-fi cityscape at twilight, sleek towers reflecting violet and amber neon lights, a single hover-cab crossing a rain-slicked bridge. Cinematic concept art, atmospheric haze, 21:9 framing.
Preloaded in FLUX.2 Pro at 21:9 / 1MP / PNG.
2.2 Custom Canvas Size
Choose Custom to set an exact pixel size. Dev accepts widths and heights from 256 to 1440 in steps of 32; Pro and Max accept 256 to 2048 in steps of 16.
Tall Phone Wallpaper
Prompt
A serene phone wallpaper of a single cherry blossom branch against a soft gradient sky, pastel pink and dawn blue, minimal Japanese illustration style, gentle negative space.
Preloaded in FLUX.2 Dev with a custom 768x1344 canvas / PNG. Both dimensions are valid for Dev's 256–1440, step-32 clamp.
03 Image References and Edits
FLUX.2 accepts uploaded images as references. Upload a sketch to turn it into a render, upload several shots of a character to keep design consistent, or hand it a product photo and ask for a new finish.
3.1 Upload and Prompt
The simplest edit: upload one image and describe what you want changed or kept. Pro and Max process the input at high fidelity automatically; Dev is the fastest option for quick edits.
Sketch to Render
Prompt
Turn this pencil sketch into a clean 3D product render of a minimal wireless speaker. Soft studio lighting, matte off-white plastic body, warm fabric grille, rounded corners. Floating at a slight angle on a neutral gray background, subtle reflection underneath.
Upload your sketch image in image-to-image mode. Preloaded in FLUX.2 Pro at 1:1 / 1MP / PNG.
3.2 Multi-Reference Consistency
For character or product consistency, upload multiple reference images and describe the exact pose or angle you want. Dev accepts up to 5 reference images; Pro and Max accept up to 8.
Character Turnaround Pick
Prompt
A brave young explorer in a khaki safari jacket, leather satchel and wide-brimmed hat, standing in a jungle clearing. Use the uploaded character references to keep the face, outfit and color scheme consistent. Soft dappled sunlight through the canopy, adventure-storybook illustration style.
Upload 2–4 reference images of the same character. Preloaded in FLUX.2 Pro at 1:1 / 0.5MP / PNG; Pro accepts up to 8 reference images.
3.3 High-Fidelity Edits
When the input is already a high-resolution photo and you want to preserve that fidelity, use Max at 4MP. Good for product reskins, background swaps on portraits and material changes.
Product Reskin
Prompt
Take the uploaded product photo and change the sneakers to a deep navy suede with off-white sole stitching, keeping the same studio lighting, shadow and camera angle. Premium e-commerce product photography, crisp detail, no extra props.
Upload the original product shot. Preloaded in FLUX.2 Max at 1:1 / 4MP / PNG — the settings that best preserve source detail.
04 Resolution and Output Format
Dev has no resolution setting — it returns the model's default size for the chosen ratio. Pro and Max expose 0.5MP, 1MP, 2MP and 4MP. All three support PNG, JPG and WebP.
4.1 Draft Cheap with Dev
Use FLUX.2 Dev for fast iteration. It has no resolution setting, so pick a ratio or a custom size and run. It is the cheapest FLUX.2 tier on Molyin.
App Icon Exploration
Prompt
A modern app icon for a habit tracker: a friendly paper airplane leaving a dotted loop trail, rounded square icon, soft gradient background in mint and cream. Flat vector style, clean shapes, no text.
Preloaded in FLUX.2 Dev at 1:1 / PNG — the fastest, cheapest FLUX.2 preset.
4.2 Final Resolution with Max
When the prompt is locked, rerun it in Max at the highest resolution you need. 4MP is the top preset and best for hero assets and large prints.
Hero Cinematic Frame
Prompt
A cinematic wide shot of a lone astronaut standing on a rust-red Martian ridge at sunset, a small habitat module glowing warm in the valley below. Dust particles catch the golden light, vast alien sky with two small moons. Epic sci-fi concept art, highly detailed, film grain.
Preloaded in FLUX.2 Max at 16:9 / 4MP / PNG. Test the prompt at a lower resolution first.
4.3 Output Format
PNG is the default and best for editing. JPG is smaller and works well for web and social use. WebP gives the best size-to-quality ratio. All three tiers expose the same three formats.
Social Media Photo
Prompt
A candid lifestyle photo of two friends laughing over coffee at a sunlit café, warm wooden table, soft bokeh background. Natural window light, authentic moment, slightly desaturated film look.
Preloaded in FLUX.2 Pro at 4:3 / 1MP / JPG — a good balance of quality and file size for web and social use.
05 Moderation and Limitations
FLUX.2 shares Black Forest Labs' content policies, plus a few practical limits. Knowing them upfront saves you from surprise blocks and disappointment.
5.1 Content Moderation
All prompts and outputs are filtered. FLUX.2's safety threshold is fixed on Molyin and can't be adjusted. If a request is blocked, the error code is content_rejected — retrying the same prompt won't help.
Fantasy Creature
Prompt
A friendly baby dragon with iridescent scales curled around a stack of old spellbooks in a cozy wizard's attic. Warm candlelight, dust motes, storybook illustration style.
Fantasy and stylized content is usually fine. Avoid requests for realistic violence, gore or sexual content — those will hit the safety filter regardless of artistic framing.
5.2 Text, Layout and Consistency
FLUX.2 handles short phrases better than long passages, but text rendering can still drift. Layout-sensitive compositions — precise grids, aligned UI mocks, exact packaging dimensions — are also hard to control. Treat the output as a starting image and plan to refine text in a design tool.
Packaging Flatlay
Prompt
A flatlay product photo of a premium chocolate box, a single open sleeve revealing dark chocolate squares, gold foil accents, scattered cocoa nibs. Soft overhead light, cream marble background, luxury packaging photography.
The layout and product form come out well; any text on the box will likely need to be added or corrected afterward in a design tool.