ComfyUI-RBG-SmartSeedVariance 🌱

Advanced Seed Diversity Enhancement for ComfyUI ✨

Some generative models (like Z-Image Turbo and Qwen-Image) suffer from limited seed variance — changing the seed produces only subtle variations or nearly identical outputs. The RBG Smart Seed Variance node solves this by intelligently injecting controlled noise into text embeddings during generation, creating meaningful diversity while preserving your prompt intention.

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Feature List 🚀

• 7 Intelligent Presets: Pre-configured variance levels from Subtle to Wild:

  • 🌱 Subtle - Gentle diversity for fine-tuning
  • 🌿 Balanced - Sweet spot for most use cases
  • 🪴 Creative - Unlock more artistic variations
  • 🌳 Bold - Significant structural changes
  • 🌴 Wild - Maximum diversity for exploration (Note this might break your prompt, use with caution!)
  • ⚙️ Custom - Fine-tune with percentage slider (0-100%)

• Model-Specific Optimization: Automatic adjustment for your architecture:

  • Z-Image Turbo, Qwen-Image, Flux (Dev/Schnell), Chroma HD, SDXL and more!

• 11 Direction Shift Patterns: Apply structured artistic biases instead of pure random noise.

• 7 Spatial Fade Curves: Control how noise fades across the embedding space.

• Flexible Noise Injection Timing: Control when variance is applied.

• Prompt Token Protection: Preserve specific parts of your prompt from noise.

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📥 Installation

1. Clone this repository into your ComfyUI/custom_nodes directory:

   git clone https://github.com/RamonGuthrie/ComfyUI-RBG-SmartSeedVariance.git

2. Install the required dependencies:

   pip install -r requirements.txt

3. Restart ComfyUI.

The node will appear under the RBG Suite/Advanced category.

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💡 Pro Tips

• Start conservative: Begin with "Balanced" preset and adjust up/down based on results
• Experiment with directions: Each artistic direction creates unique aesthetic shifts - try them all!
• Protect your keywords: Use "First Half" protection if important prompt concepts are being overridden
• Track your seed: Use consistent seeds to compare variance effects side-by-side
• Model matters: Always select the correct model type for optimal results and avoiding over-correction
• Combine strategies: Mix direction shifts with fade curves and noise injection timing for sophisticated effects
• Use custom mode: Fine-tune with the slider when presets don't match your needs exactly
• Chain more then one: For advanced effects, you can chain multiple Smart Seed Variance nodes.

Watch the Demo video 📺

Untitled.video.-.Made.with.Clipchamp.1._1.mp4

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🐛 Troubleshooting

Output looks exactly the same?

• Increase preset to "Bold" or "Creative"
• Check that the node is connected to your conditioning
• Verify model type is correct for your actual model
• Try a different seed value

Quality degraded or image broken?

• Reduce preset to "Subtle"
• Enable prompt protection ("First Half" or "First Quarter")
• Switch direction shift to "🚫 None" to use pure random
• Try "Ending Steps" to limit variance timing to fine details only

Getting strange/unexpected outputs?

• Reduce shift_strength to 50-70%
• Try a different direction shift pattern
• Verify ComfyUI version compatibility

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Usage 🚀

To use the RBG Smart Seed Variance node, connect it between your KSampler and the Conditioning input. This allows the node to modify the conditioning based on your chosen variance settings.

Contributing ❤️

Contributions are always welcome! If you have any suggestions, improvements, or new ideas, please feel free to submit a pull request or open an issue.

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License 📜

This project is licensed under the MIT License.