> ## Documentation Index > Fetch the complete documentation index at: https://docs.bfl.ml/llms.txt > Use this file to discover all available pages before exploring further. # JSON Structured Prompting > Use structured JSON prompts for precise control over complex scenes You can write a FLUX.2 prompt as JSON to organize subjects, styles, and composition in your application. Send it as a string in the `prompt` field. **When to use JSON**: * Production workflows requiring consistent structure * Automation and programmatic generation * Complex scenes with multiple subjects and relationships * When you need to iterate on specific elements independently **When natural language works better**: * Quick iterations and exploration * Simple, single-subject scenes * When prompt length isn't a concern * Creative workflows where flexibility matters Choose the format that is easier to maintain in your workflow and compare results with your own prompts. ## The Base Schema ```json theme={null} { "scene": "overall scene description", "subjects": [ { "description": "detailed subject description", "position": "where in frame", "action": "what they're doing" } ], "style": "artistic style", "color_palette": ["#hex1", "#hex2", "#hex3"], "lighting": "lighting description", "mood": "emotional tone", "background": "background details", "composition": "framing and layout", "camera": { "angle": "camera angle", "lens": "lens type", "depth_of_field": "focus behavior" } } ``` ## Building a Prompt Step by Step Build a product shot incrementally to see how each element contributes. ### Step 1: Generating a coffee mug ```json theme={null} { "scene": "Professional studio product photography setup with polished concrete surface", "subjects": [ { "description": "Minimalist ceramic coffee mug with steam rising from hot coffee inside", "pose": "Stationary on surface", "position": "Center foreground on polished concrete surface", "color_palette": ["matte black ceramic"] } ], "style": "Ultra-realistic product photography with commercial quality", "color_palette": ["matte black", "concrete gray", "soft white highlights"], "lighting": "Three-point softbox setup creating soft, diffused highlights with no harsh shadows", "mood": "Clean, professional, minimalist", "background": "Polished concrete surface with studio backdrop", "composition": "rule of thirds", "camera": { "angle": "high angle", "distance": "medium shot", "focus": "Sharp focus on steam rising from coffee and mug details", "lens-mm": 85, "f-number": "f/5.6", "ISO": 200 } } ``` ![Professional product shot of a single black coffee mug with steam](https://cdn.sanity.io/images/2gpum2i6/production/037c25d7ee0500d7f795b7fdd7d05a6c779ff5bd-1024x768.webp) ### Step 2: Adding a second mug in a different color ```json theme={null} { "scene": "Professional studio product photography setup with polished concrete surface", "subjects": [ { "description": "Minimalist ceramic coffee mug with steam rising from hot coffee inside", "pose": "Stationary on surface", "position": "Center foreground on polished concrete surface", "color_palette": ["matte black ceramic"] }, { "description": "Minimalist ceramic coffee mug, matching design to the black mug", "pose": "Stationary on surface", "position": "Right side of the black mug on polished concrete surface", "color_palette": ["matte yellow ceramic"] } ], "style": "Ultra-realistic product photography with commercial quality", "color_palette": ["matte black", "matte yellow", "concrete gray", "soft white highlights"], "lighting": "Three-point softbox setup creating soft, diffused highlights with no harsh shadows", "mood": "Clean, professional, minimalist", "background": "Polished concrete surface with studio backdrop", "composition": "rule of thirds", "camera": { "angle": "high angle", "distance": "medium shot", "focus": "Sharp focus on steam rising from coffee and both mugs in frame", "lens-mm": 85, "f-number": "f/5.6", "ISO": 200 } } ``` ![Product shot with black and yellow coffee mugs](https://cdn.sanity.io/images/2gpum2i6/production/d56be2a807b5923e15964eae6132f79bce66be22-1024x768.webp) ### Step 3: Change the color of the steam ```json theme={null} { "scene": "Professional studio product photography setup with polished concrete surface", "subjects": [ { "description": "Minimalist ceramic coffee mug with bright red steam rising from hot coffee inside", "pose": "Stationary on surface", "position": "Center foreground on polished concrete surface", "color_palette": ["matte black ceramic", "bright red steam"] }, { "description": "Minimalist ceramic coffee mug, matching design to the black mug", "pose": "Stationary on surface", "position": "Right side of the black mug on polished concrete surface", "color_palette": ["matte yellow ceramic"] } ], "style": "Ultra-realistic product photography with commercial quality", "color_palette": ["matte black", "matte yellow", "bright red", "concrete gray", "soft white highlights"], "lighting": "Three-point softbox setup creating soft, diffused highlights with no harsh shadows", "mood": "Clean, professional, minimalist", "background": "Polished concrete surface with studio backdrop", "composition": "rule of thirds", "camera": { "angle": "high angle", "distance": "medium shot", "focus": "Sharp focus on steam rising from coffee and both mugs in frame", "lens-mm": 85, "f-number": "f/5.6", "ISO": 200 } } ``` ![Product shot with black and yellow mugs, red steam rising from the black mug](https://cdn.sanity.io/images/2gpum2i6/production/50a2056e955f4f231e7968e69c3a89fd7d78270d-1024x768.webp) You can include the JSON directly in your prompt, or flatten it into natural language. FLUX.2 understands both formats. For precise brand color matching with hex codes, see [HEX Color Prompting](/guides/usecases_t2i_hex_color_prompting). This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.