Beginner's Guide to Writing Prompts for FLUX

1. Introduction

With the advancement of AI technology, the possibilities for text and image generation are expanding. Among these, the FLUX model is gaining particular attention. FLUX is characterized by its flexibility and high level of customization. Even beginners can create highly creative results by crafting prompts tailored to their objectives and preferences. This guide explains the basic points for beginners to start writing prompts for FLUX, with a focus on the differences between FLUX and SD1.5 or SDXL.

2. Differences Between SD1.5, SDXL, and FLUX

Understanding the differences between FLUX and traditional models like Stable Diffusion 1.5 (SD1.5) or SDXL is essential for writing prompts effectively.

• SD1.5 / SDXL

　　Preset phrases are effective: In SD1.5 and SDXL, including preset phrases such as "masterpiece," "best quality," and "highly detailed" in the prompt often improves the quality of the output.

　　Example:A serene landscape, masterpiece, best quality, highly detailedNegative prompts are also effective: You can specify elements to exclude from the generated image.Example:blurry, low quality, bad anatomyThese models deliver high-quality results with minimal effort but have somewhat limited flexibility.

• FLUX

　　Highly flexible: FLUX allows for finer customization and can deeply reflect specific styles or themes.Preset phrases are not mandatory: While FLUX often delivers high-quality results without preset phrases like "masterpiece" or "best quality," including them can still help fine-tune results.No negative prompts: Since FLUX does not support negative prompts, undesired elements must be avoided by explicitly describing what you want in the main prompt.

　　Example: To avoid unwanted elements, specify them directly in the description, such as "clear sky without clouds" or "sharp and detailed, no blur."

3. Basics of Writing Prompts for FLUX

When writing prompts for FLUX, consider breaking them into the following three sections:

1. Main Theme: Concisely describe the main subject you want to generate.Example: "A serene forest at sunrise"
2. Detailed Settings: Add specific elements for more precision.Example: "Soft golden light filtering through the trees, mist in the air, birds flying"
3. Style Specification: Define the appearance or atmosphere of the generated image.Example: "Hyper-realistic, cinematic, vibrant colors"

To avoid unwanted elements, express this explicitly within the prompt:

　Example:A tranquil lake surrounded by mountains, no fog, clear sky, sharp details

4. Tips for Writing Prompts

1. Visualize Your IdeaPicture the image you want to generate clearly in your mind, then translate it into words.
2. Keep It Simple and SpecificOverly long prompts can dilute the information. Choose concise and accurate words.
3. Refine Through Trial and ErrorAchieving perfect results on the first try is rare. Gradually adjust your prompt to align closer to your ideal.
4. Leverage LoRA ModelsUse LoRA models to specialize in specific styles or themes. Experiment with different LoRAs to discover unique artistic effects.Try various LoRA models and prompts to find the combination that works best for you. Additionally, most FLUX-compatible LoRAs are available on platforms like SeaArtInfinity.

5. Beginner-Friendly Prompt Format

Here are some sample prompt formats anyone can use:

1. Natural

Scenery

Main Theme: "A tranquil mountain landscape

・Detailed Settings: "Snow-capped peaks, a clear blue lake, pine trees surrounding the area

・Style Specification: "Photorealistic, warm colors, highly detailed

・Avoiding unwanted elements: "no fog, no blur"

Character Description

Main Theme: "A young wizard casting a spell

・Detailed Settings: "Flowing robe, glowing staff, sparks of magic around

・Style Specification: "Fantasy art, highly detailed, vibrant colors

・Avoiding unwanted elements: "no bad anatomy, no dull colors"

Futuristic City

・Main Theme: "A bustling cyberpunk city

・Detailed Settings: "Neon lights, flying cars, towering skyscrapers, crowded streets

・Style Specification: "Cinematic, dark atmosphere, vivid neon colors

・Avoiding unwanted elements: "no empty streets, no washed out colors"

6. Conclusion

Writing prompts for FLUX is an accessible task, even for beginners. Compared to SD1.5 and SDXL, FLUX offers greater flexibility and allows for more detailed customization. While referring to preset phrases like "masterpiece," it is essential to note that FLUX does not support negative prompts. Instead, carefully crafting your description to exclude undesired elements directly within the main prompt is crucial. Experiment with various prompts and enjoy discovering your unique creative expression!