Flux is one of the most capable open-weight AI image generators available — but most users only unlock 10% of its potential. This guide covers every parameter, prompt structure, and technique to get professional results every time.
Flux consistently produces some of the most photorealistic and aesthetically refined AI images available. Its open-weight architecture means you can run it locally, fine-tune it with LoRA adapters, and integrate it into any workflow — making it the go-to tool for designers, marketers, and creators who need images that look genuinely professional.
Unlike closed API tools, Flux gives you full control over every parameter. Learning that parameter space — guidance scale, steps, LoRA weights, and prompt structure — is what separates mediocre outputs from stunning ones.
Generate studio-quality product shots with controlled lighting, backgrounds, and angles — no photographer needed.
Create consistent brand imagery, mood boards, and marketing assets that match your visual identity.
Explore environments, characters, and scenes for games, films, books, and creative projects.
Prototype interface mockups, hero backgrounds, and design system components at lightning speed.
Lifestyle shots, banner ads, social media visuals, and seasonal campaign imagery at scale.
Explore painting styles, illustration techniques, and artistic movements from realism to surrealism.
Four habits that separate average Flux outputs from images people think are real.
Put the most important element first. Flux weights the beginning of your prompt more heavily than the end.
Add "shot on [camera], [lens]mm lens" for photorealistic results. "Shot on Sony A7R V, 85mm" reads very differently to the model than "photo."
Flux's default guidance follows your prompt closely. Lowering guidance_scale gives the model more creative latitude — useful for artistic and abstract outputs.
Find a composition you like? Copy its seed from the job ID and use --seed [number] to iterate on that exact composition with different styles.
12 parameters · Click any example to copy it
aspect_ratioAspect ratio. Common: 1:1 (square), 16:9 (widescreen), 9:16 (portrait/mobile), 3:2 (photo).
modelModel variant. flux.1-dev for quality, flux.1-schnell for speed. Use LoRA add-ons for style specialization.
guidance_scaleHow closely the output follows your prompt. Range: 1–20. Higher = more literal, lower = more creative.
num_inference_stepsNumber of denoising steps. More steps = higher quality but slower. 20–30 is the sweet spot for most use cases.
seedLocks the random seed for reproducible results. Use the same seed to iterate on a composition.
negative_promptNegative prompting. Describe what to exclude from the image.
lora_scaleStrength of a LoRA style adapter. Range: 0–1. Higher = stronger style influence.
width / heightOutput dimensions in pixels. Must be multiples of 64. Larger sizes require more VRAM.
style_refStyle reference image. Feed an image URL to match its visual style across new generations.
img2img strengthFor image-to-image: how much the output deviates from the input. 0 = identical, 1 = fully regenerated.
output_formatOutput file format. webp for web use, png for transparency, jpg for smaller file sizes.
output_qualityCompression quality for jpg/webp. Range: 0–100. 80–95 is the practical range for most use cases.
8 expert templates · Replace [BRACKETS] with your details and copy
Professional e-commerce product photography with controlled studio lighting on a clean background.
Wide cinematic shot for website heroes, banners, and brand campaigns.
Sweeping fantasy landscape with dramatic lighting and cinematic scale.
High-fashion editorial portrait with professional lighting and styling.
Futuristic dark UI mockup for apps, dashboards, and SaaS products.
Clean, modern flat illustration for websites, apps, and marketing materials.
Seamless repeating textures and patterns for web backgrounds, packaging, and design assets.
Clean, scalable logo mark concepts for brand identity projects.
The Flux Mastery tutorial covers every parameter, advanced technique, and real-world project — from zero to professional-grade images in 18 lessons.
Flux is an open-weight model by Black Forest Labs. Prompt.Doctor is an independent educational resource and is not affiliated with, endorsed by, or an official partner of Black Forest Labs. All product names, trademarks, and registered trademarks are the property of their respective owners.