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LTX-2.3 22B IC-LoRA CROOKED

IC-LoRA adapter for LTX-2 that transforms close-up portrait videos from straight eyes to permanent convergent strabismus (inward-turned / crossed eyes), while preserving facial expression, head movement, lighting, and camera framing.

Model Details

Base model: ltx2.3-20b-20k-step-2362000-v4.safetensors (Lightricks LTX-2)
Type: IC-LoRA (video-to-video)
Training steps: 3000
LoRA rank / alpha: 32 / 32
Resolution buckets: 960×544×49 (landscape), 544×960×49 (portrait)

Requirements

This LoRA is an adapter, not a standalone model. You also need:

Base checkpoint: ltx2.3-20b-20k-step-2362000-v4.safetensors
Text encoder: gemma-3-12b-it-qat-q4_0-unquantized
A reference video with straight eyes

Frame count must satisfy frames % 8 == 1 (e.g. 49, 145, 201). Use 544×960 for portrait clips.

Usage

LTX Trainer

cd LTX-2/packages/ltx-trainer

uv run python scripts/inference.py \
  --checkpoint path/to/ltx2.3-20b-20k-step-2362000-v4.safetensors \
  --text-encoder-path path/to/gemma-3-12b-it-qat-q4_0-unquantized \
  --lora-path path/to/lora_weights_step_03000.safetensors \
  --reference-video path/to/straight_eye_clip.mp4 \
  --prompt "A close-up portrait video of a man with permanent severe convergent strabismus. Both eyes are continuously turned inward toward the nose throughout the shot. The subject maintains natural facial expression, head movement, lighting, and camera framing." \
  --negative-prompt "normal eyes, straight eyes, corrected eyes, gaze correction, blurry, jittery" \
  --width 960 --height 544 \
  --num-frames 49 \
  --num-inference-steps 30 \
  --guidance-scale 4.0 \
  --stg-scale 1.0 --stg-blocks 29 --stg-mode stg_v \
  --skip-audio \
  --output crooked.mp4

ComfyUI

Place lora_weights_step_03000.safetensors in ComfyUI/models/loras/.
Load the matching LTX 2.3 base checkpoint.
Use an IC-LoRA / video-to-video workflow with a reference video input.

Reference workflows: LTX-2 repository.

Example Prompts

Positive:

A close-up portrait video of a man with permanent severe convergent strabismus. Both eyes are continuously turned inward toward the nose throughout the shot. The subject maintains natural facial expression, head movement, lighting, and camera framing.

Negative:

worst quality, inconsistent motion, blurry, jittery, distorted, normal eyes, straight eyes, corrected eyes, gaze correction

License

This model inherits the license of the base model (Lightricks LTX-2).

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