Mastering Consistent AI-Generated Images with a JSON Style Guide

Introduction

As a curious developer, I’m always seeking ways to streamline image generation with GPT. By defining a strict JSON style guide, you can get reliably stunning results - every time. Let’s dive into a reusable spec and a quick example.

The JSON Style Guide

{
  "style": "ultra-detailed hyper-realistic cinematic 3D render with volumetric glow",
  "material": "matte ceramic with subtle micro-textures",
  "surface_texture": "smooth, finely grained with realistic light scatter",
  "lighting": {
    "type": "studio HDRI",
    "intensity": "high",
    "direction": "angled top-left key light + soft fill",
    "accent_colors": ["warm amber", "cool teal"],
    "reflections": true,
    "refractions": false,
    "dispersion_effects": false,
    "bloom": true
  },
  "color_scheme": {
    "primary": "soft ivory matte",
    "secondary": "muted earth tones",
    "highlights": "gentle glowing edges",
    "rim_light": "subtle warm backlight"
  },
  "background": {
    "color": "deep charcoal",
    "vignette": true,
    "texture": "none"
  },
  "post_processing": {
    "chromatic_aberration": false,
    "glow": true,
    "high_contrast": true,
    "sharp_details": true
  }
}

Quick Example: Matte Ceramic Vase

{
  "style": "ultra-detailed hyper-realistic cinematic 3D render with volumetric glow",
  "material": "matte ceramic with subtle micro-textures",
  "surface_texture": "smooth, finely grained with realistic light scatter",
  "lighting": {
    "type": "studio HDRI",
    "intensity": "high",
    "direction": "angled top-left key light + soft fill",
    "accent_colors": ["warm amber", "cool teal"],
    "reflections": true,
    "bloom": true
  },
  "color_scheme": {
    "primary": "soft ivory matte",
    "secondary": "muted earth tones",
    "highlights": "gentle glowing edges",
    "rim_light": "subtle warm backlight"
  },
  "background": {
    "color": "deep charcoal",
    "vignette": true
  },
  "post_processing": {
    "glow": true,
    "high_contrast": true,
    "sharp_details": true
  }
}

Workflow

Define your guide once in JSON.
Embed it in your GPT prompt before each generation.
Generate images - GPT will honor every constraint.
Adjust only the parameters you need (e.g. swap “matte ceramic” for “polished metal”).

Best Practices

Keep keys consistent. Order and naming matter.
Be explicit. Don’t leave defaults to chance.
Iterate in small steps. Tweak one parameter at a time.
Document changes. Version your JSON alongside your code.

With this approach, you’ll spend less time chasing the “right look” and more time building amazing visuals, consistently at last!