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OmerHagage/
ltx2-greenscreen-avatar-ic-lora-vertical-v1

Name: ltx2-greenscreen-avatar-ic-lora-vertical-v1
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LTX-2.3 Greenscreen Avatar — IC-LoRA

Vertical talking-head avatars on a flat green chroma-key background — ready to composite.

Base model

An In-Context LoRA (IC-LoRA) for Lightricks/LTX-2.3, trained on top of the ltx-2.3-22b-dev.safetensors checkpoint. It specializes the base model in generating vertical talking-head avatars on a flat green chroma-key background, ready for compositing in downstream video pipelines.

Property	Value
Base model	`Lightricks/LTX-2.3` (`ltx-2.3-22b-dev.safetensors`)
Adapter type	IC-LoRA (in-context LoRA)
Orientation	Vertical (portrait)
Task	Video-to-video / text-to-video
Weights	`lora_weights_step_05000.safetensors`

Samples

Prompt used for all samples

"A person talking directly to the camera against a flat green chroma-key background. Natural lip sync, occasional blinks, subtle head movements. Soft natural lighting, photorealistic, sharp focus, stable framing."

High-quality example — input generation → green-screen output (side-by-side comparison):

Model Details

Developed by: Lightricks (fine-tune)
Base model: Lightricks/LTX-2.3 — ltx-2.3-22b-dev.safetensors
Adapter type: In-Context LoRA (IC-LoRA)
Trainer: LTX-2

Training

Hyperparameter	Value
Training type	IC-LoRA fine-tuning
Training steps	5,000
Learning rate	2e-4
Batch size	1

Intended Use

This IC-LoRA is built for producing vertical talking-head avatars on a clean green chroma-key background, so the subject can be keyed out and composited onto any background. Use cases include:

Avatar & presenter clips — short, front-facing talking-head shots with natural lip sync, blinks, and subtle head movement.
Greenscreen compositing — the flat chroma-key background makes keying and background replacement straightforward in any editor.
Vertical / portrait content — sized for mobile-first formats such as Reels, Shorts, and TikTok.

Usage

This adapter is designed for the LTX-2.3 (Lightricks audio-video) pipeline and can be used with the standard LTX-2.3 tooling (ComfyUI or diffusers).

🔌 Using Trained LoRAs in ComfyUI

In order to use this LoRA in ComfyUI, follow these steps:

Copy lora_weights_step_05000.safetensors to the models/loras folder in your ComfyUI installation.
In your ComfyUI workflow:
- Add the "Load LoRA" node and select lora_weights_step_05000.safetensors
- Connect it to the "Load Checkpoint" node (ltx-2.3-22b-dev.safetensors) to apply the LoRA to the base model

You can find reference Text-to-Video (T2V) and Image-to-Video (I2V) workflows in the official LTX-2 repository.

License

This adapter is released under the MIT license and is intended to be used together with the base model, Lightricks/LTX-2.3. Please review and comply with the base model's own license before use.

Acknowledgments

Base model: Lightricks/LTX-2.3
Trainer: LTX-2

OmerHagage/ltx2-greenscreen-avatar-ic-lora-vertical-v1