This repository provides a ComfyUI implementation of "Cutoff," a technique for precisely controlling prompt attribute influence in Stable Diffusion. It allows users to isolate specific word meanings within a prompt, preventing unintended attribute bleeding (e.g., ensuring "blue" modifies "hair" and not "shoes"). This is beneficial for users seeking finer-grained control over image generation and prompt interpretation.

How It Works

Cutoff operates by manipulating CLIP embeddings. It identifies tokens within a prompt and generates alternative embeddings where specific tokens are masked. By calculating the difference between the original and masked embeddings, it creates a directional vector that isolates the intended meaning of a token. This directional vector is then used to guide the diffusion process, enhancing control over attribute assignment within the generated image. The implementation uses three ComfyUI nodes: Cutoff BasePrompt, Cutoff Set Region, and Cutoff Regions To Conditioning (with an ADV variant for advanced weighting).

Quick Start & Requirements

• Install via ComfyUI custom nodes manager or by cloning the repository into the custom_nodes directory.
• Requires ComfyUI and its dependencies.
• No specific hardware requirements beyond those for ComfyUI itself.
• Example workflows and images are provided in the repository.

Highlighted Details

• Enables precise control over attribute assignment in prompts (e.g., color to specific objects).
• Offers fine-grained masking and directional embedding manipulation.
• Includes an advanced node variant for nuanced prompt weighting interpretation.
• Nodes are available under the conditioning > cutoff category in ComfyUI.

Maintenance & Community

• Developed by BlenderNeko.
• No specific community links (Discord/Slack) or roadmap are mentioned in the README.

Licensing & Compatibility

• The repository does not explicitly state a license.
• Compatibility with SDXL is noted as functional but potentially less effective in earlier versions (e.g., 0.9).

Limitations & Caveats

The README notes that while functional with SDXL, effectiveness may vary, particularly with older versions. The absence of an explicit license could pose compatibility concerns for commercial or closed-source projects.