---
base_model:
- Lightricks/LTX-2.3
base_model_relation: adapter
license: other
license_name: ltx-2-community-license
license_link: https://github.com/Lightricks/LTX-2/blob/main/LICENSE
language:
- en
tags:
- ltx-video
- ic-lora
- ltx-2.3
- video-to-video
- upscaling
- super-resolution
- spatial-upscaler
- ltx
pipeline_tag: video-to-video
extra_gated_description: >-
  By clicking "Agree and Access" you acknowledge the [Privacy
  Policy](https://static.lightricks.com/legal/Privacy%20Policy%20-%20LTX%20Platform.pdf)
  and consent to receive offers and updates including targeted and personalized
  advertisements. You can unsubscribe at any time.
extra_gated_button_content: Agree and Access
widget:
- text: >-
    Albert Hamstein, a brilliant hamster physicist with wild white fur and tiny
    round glasses, stands before a chalkboard covered in equations and diagrams.
    The camera slowly pushes in. Warm sunlight illuminates detailed fur, tweed
    fabric, chalk dust, aged books, and polished brass instruments.
    Photorealistic historical academia, rich textures, cinematic lighting.
    Audio: soft chalk writing, and absolute silence. As he looks at the camera,
    he says with a thinking voice: "First, imagine a spherical chicken in a
    vacuum..."
  output:
    url: examples/spatial_upscale_4x_sbs.mp4
---

# LTX-2.3 22B IC-LoRA Pixel Spatial Upscaler

These are **Pixel Spatial Upscaler** IC-LoRAs trained on top of **LTX-2.3-22B**, available in **2×** and **4×** variants. They creatively upscale a low-resolution video, synthesizing fine detail rather than simply interpolating — making them generative upscalers rather than refiners.

They are based on the [LTX-2.3](https://huggingface.co/Lightricks/LTX-2.3) foundation model.

<Gallery />

> [!TIP]
> ## 🤗 🎞️→✨ Try it live
> ### **[LTX-2.3 Pixel Spatial Upscaler (4×) Space](https://huggingface.co/spaces/Lightricks/ltx-2-3-spatial-upscaler)**

## Model Files

- `ltx-2.3-22b-ic-lora-pixel-spatial-upscaler-x2-0.9.safetensors` — the 2× upscaler checkpoint.
- `ltx-2.3-22b-ic-lora-pixel-spatial-upscaler-x4-0.9.safetensors` — the 4× upscaler checkpoint.

## Model Details

- **Base Model:** LTX-2.3-22B Video
- **Training Type:** IC-LoRA (video-to-video, reference-conditioned)
- **Control Type:** Low-resolution reference video drives a 2× or 4× high-resolution re-render with synthesized spatial detail.

## Intended Use & Out-of-Scope

**Intended use:** Creative upsampling as part of a generation flow. The recommended workflow is to generate a draft at a very low base resolution (e.g. ~280p) to nail composition and motion, then run an upscaler to produce a high-resolution result with synthesized detail. Choose the 2× variant for moderate upscaling or the 4× variant for larger jumps in resolution.

**Out of scope:** These are not blind denoisers or compression artefact removers. The models synthesize new detail rather than faithfully preserving the reference — use them as a creative step, not a pixel-accurate refiner.

## How to Use

The level of fidelity to the original can be controlled via generation parameters (LoRA strength, guidance, steps). Lower strength keeps the output closer to the reference; higher strength allows more creative hallucination of detail.

**Recommended workflow:**

1. Generate your video at a low base resolution (~280p) until satisfied with composition and subject motion.
2. Feed that clip as the reference and run the 2× or 4× upscaler to produce the final high-resolution output.


## Usage

### 🔌 ComfyUI

1. Copy the LoRA weights into `models/loras`.
2. Load the **LTX-2.3-22B** base model and add the desired upscaler — `ltx-2.3-22b-ic-lora-pixel-spatial-upscaler-x2-0.9.safetensors` (2×) or `ltx-2.3-22b-ic-lora-pixel-spatial-upscaler-x4-0.9.safetensors` (4×) — as the LoRA.
3. Use an IC-LoRA (video-to-video) workflow from the [LTX-2 ComfyUI repository](https://github.com/Lightricks/ComfyUI-LTXVideo/). Connect your low-resolution clip as the reference video.

## References

- **Code:** [GitHub Repository](https://github.com/Lightricks/LTX-2)
- **ComfyUI:** [ComfyUI-LTXVideo](https://github.com/Lightricks/ComfyUI-LTXVideo/)
- **IC-LoRA docs:** [IC-LoRA usage guide](https://docs.ltx.video/open-source-model/usage-guides/ic-lo-ra)

## License

See the **LTX-2-community-license** for full terms.

## Acknowledgments

- Base model by **Lightricks**
- Training infrastructure: **LTX-2 Community Trainer**