Power LTX LoRA Loader Extra

A powerful LoRA management node for ComfyUI that enables precise, layer-specific control over multiple LoRAs in LTX2 video generation workflows.

Features

• Multi-LoRA Support: Load and apply multiple LoRAs simultaneously with individual strength controls
• Layer-Specific Strength Control: Fine-tune LoRA influence across different network layers:
  • STR (Strength Model): Overall model strength
  • Vid (Video): Video attention layers
  • V2A (Video-to-Audio): Cross-modal attention (video → audio)
  • Aud (Audio): Audio-specific layers
  • A2V (Audio-to-Video): Cross-modal attention (audio → video)
  • Other: Remaining network components
• Intuitive UI: Drag-and-drop row reordering, toggle enable/disable, quick click-to-edit values
• Optional Model Input: Use as a standalone LoRA manager even without a model input
• JSON Output: Export a rich JSON structure of all selected LoRAs for external processing
• Raw Config Editor: Click the ⚙ button to copy/paste the entire LoRA configuration as JSON for easy sharing and batch editing
• Sidecar Metadata Support: Automatically loads metadata from .json sidecar files alongside LoRA weights

Installation

1. Clone or download this repository into your ComfyUI custom_nodes directory:

   cd ComfyUI/custom_nodes
   git clone https://github.com/yourusername/ComfyUI-PowerLTXLoraLoaderExtra.git
   cd ComfyUI-PowerLTXLoraLoaderExtra

2. Restart ComfyUI or reload the browser page.

3. The node will appear in the node menu under Loaders > Power LTX LoRA Loader Extra.

Usage

Basic Workflow

1. Create a Power LTX LoRA Loader Extra node
2. Connect a model input (optional — the node works standalone)
3. Click + Add LoRA to add rows
4. Click the LoRA name field to open a searchable menu of available LoRAs
5. Adjust strength values by:
   • Dragging left/right for fine control
   • Single clicking to open a text input for exact values
6. Toggle the ● circle on/off to enable/disable individual LoRAs
7. Drag rows by the ≡ grip to reorder
8. Click ✕ to delete a row

UI Elements

Element	Action	Purpose
⚙ (Config)	Click	Open raw JSON editor for copy/paste/sharing
≡ (Grip)	Drag vertically	Reorder LoRA rows
● (Toggle)	Click	Enable/disable the LoRA
LoRA Name	Click	Open searchable LoRA selection menu
STR, Vid, V2A, Aud, A2V, Other	Drag or click	Adjust layer-specific strengths (0.00–∞)
✕ (Trash)	Click	Delete the row
+ Add LoRA	Click	Add a new empty row

Outputs

• Model: The input model with all active LoRAs applied
• lora_data: JSON string containing metadata for all selected LoRAs (enabled and disabled)

Example Output

The lora_data output includes all LoRAs with selected weights:

[
  {
    "name": "my_lora.safetensors",
    "path": "/path/to/my_lora.safetensors",
    "enabled": true,
    "strength_model": 1.0,
    "video": 0.8,
    "video_to_audio": 1.0,
    "audio": 0.5,
    "audio_to_video": 1.0,
    "other": 1.0,
    "metadata": {...}
  }
]

Sharing and Batch Editing

Using the Config Editor (⚙)

The easiest way to share or batch-edit your LoRA configuration:

1. Click the ⚙ button in the top-right of the node
2. Copy the compact JSON from the dialog
3. Edit it in your text editor (VSCode, notepad, etc.)
4. Paste the edited JSON back and press Enter
5. Invalid JSON is ignored — the config stays unchanged

Example config:

[{"on":true,"lora":"style_lora.safetensors","str":1.0,"vid":0.8,"v2a":1.0,"aud":0.5,"a2v":1.0,"other":1.0},{"on":false,"lora":"face_detail.safetensors","str":0.7,"vid":1.0,"v2a":1.0,"aud":1.0,"a2v":1.0,"other":1.0}]

Workflow JSON Editing

You can also hand-edit workflows in the saved JSON file:

1. Open the workflow JSON file
2. Locate your node's properties.lora_data field (it's a proper JSON array, not escaped)
3. Edit the LoRA list directly
4. Save and reload in ComfyUI — changes will be reflected in the node UI

Key Differences from Power Lora Loader

This node extends the original Power Lora Loader concept with:

• Layer-specific strength control: Separate sliders for video, audio, and cross-modal attention (essential for LTX2)
• Disabled LoRA tracking: LoRAs can be toggled off without removing them from the config
• JSON output port: Easy integration with downstream nodes or external tools
• Responsive UI: The LoRA name column expands when the node is widened
• Improved interaction: Better drag-to-reorder, click-to-edit, and visual feedback

Troubleshooting

LoRA doesn't appear in the menu

• Ensure the LoRA file is in your ComfyUI models/loras directory
• Refresh the page or restart ComfyUI

Disabled LoRAs don't affect the model

• Disabled LoRAs (toggle off) are kept in your configuration but not applied to the model
• Your full configuration (including disabled LoRAs with their values) is preserved in the workflow

Can't shrink the node after expanding it

• Drag the node's resize handle (bottom-right corner) to make it narrower
• The node enforces a minimum width of 500px to keep the UI usable

License

Apache 2.0. In LICENSE.md

Credits

Based on the Power Lora Loader concept, extended with layer-specific strength control and LTX2 support.

Contributing

Contributions, bug reports, and feature requests are welcome! Please open an issue or submit a pull request.