Extend a video on any side, and LTX 2.3 paints the new area. Your video goes back on top of the result, and its sound is kept.<h2 id="how-to-use-it">How to use it</h2><ol><li>Load your video.</li><li>Pick a ratio. It opens on 16:9, which turns a phone clip into a wide one. The small button next to the ratios flips portrait and landscape.</li><li>Press Run.</li></ol><h2 id="what-you-need">What you need</h2><ul><li>AusBoss nodes 2.15.0 or newer. In ComfyUI-Manager, search "AusBoss". Already have them? Update first.</li><li>The LTX 2.3 models and the two LoRAs:<ul><li><a target="_blank" rel="ugc" href="https://huggingface.co/Kijai/LTX2.3_comfy/resolve/main/diffusion_models/ltx-2.3-22b-dev_transformer_only_fp8_scaled.safetensors">ltx-2.3-22b-dev_transformer_only_fp8_scaled.safetensors</a> → <code>models/diffusion_models</code> · 23.5 GB</li><li><a target="_blank" rel="ugc" href="https://huggingface.co/Comfy-Org/ltx-2/resolve/main/split_files/text_encoders/gemma_3_12B_it_fp8_scaled.safetensors">gemma_3_12B_it_fp8_scaled.safetensors</a> → <code>models/text_encoders</code> · 13.2 GB</li><li><a target="_blank" rel="ugc" href="https://huggingface.co/Kijai/LTX2.3_comfy/resolve/main/text_encoders/ltx-2.3_text_projection_bf16.safetensors">ltx-2.3_text_projection_bf16.safetensors</a> → <code>models/text_encoders</code> · 2.31 GB</li><li><a target="_blank" rel="ugc" href="https://huggingface.co/Kijai/LTX2.3_comfy/resolve/main/vae/LTX23_video_vae_bf16.safetensors">LTX23_video_vae_bf16.safetensors</a> → <code>models/vae</code> · 1.45 GB</li><li><a target="_blank" rel="ugc" href="https://huggingface.co/Kijai/LTX2.3_comfy/resolve/main/loras/ltx-2.3-22b-distilled-1.1_lora-dynamic_fro09_avg_rank_111_bf16.safetensors">ltx-2.3-22b-distilled-1.1_lora-dynamic_fro09_avg_rank_111_bf16.safetensors</a> → <code>models/loras</code> · 2.74 GB</li><li><a target="_blank" rel="ugc" href="https://huggingface.co/oumoumad/LTX-2.3-22b-IC-LoRA-Outpaint/resolve/main/ltx-2.3-22b-ic-lora-outpaint.safetensors">ltx-2.3-22b-ic-lora-outpaint.safetensors</a> → <code>models/loras</code> · 1.31 GB</li></ul></li></ul><h2 id="tips">Tips</h2><ul><li>Keep the fill color black. Pure black is what the IC-LoRA paints over. Gray or any other color comes back as a flat bar.</li><li>Crop out edges that confuse it. Noise, a frame line or a busy strip along the edge of your clip can make the new area come out strange. Drag the blue handles on Video Crop + Rotate + Pad inward to cut those edges off first.</li><li>It makes 97 frames from IN, about 4 seconds at 24 fps. Drag IN on the timeline to pick the start. On a 60 fps clip, set Every nth to 2 or 3 for more seconds.</li><li>Very dark footage can come back flat. Night or underwater clips can read as a bar. Brighten the clip first (gamma 2.0) and darken the result after (gamma 0.5).</li><li>Out of memory? Lower Megapixels on the video node, or use the smaller int8_convrot transformer in the same Kijai folder.</li><li>Part of the new area still black? Run it again with another seed.</li><li>About 2 minutes a run for a short clip on an RTX 5090, model loading included.</li></ul><h2 id="credits">Credits</h2>LTX-2.3 is by Lightricks, under the LTX-2 Community License: companies making US$10M or more a year need a paid license from Lightricks. The ComfyUI files are Kijai's split, and Gemma 3 12B is Google's model, packaged by Comfy-Org. The outpaint IC-LoRA is by <a target="_blank" rel="ugc" href="https://huggingface.co/oumoumad/LTX-2.3-22b-IC-LoRA-Outpaint">oumoumad</a>, under the same license. The clip in the gallery was made with Qwen Image 2.1 and MiniMax H3, and their licenses cover it.v1.2 (2026-10-20): new notes on the canvas, everything pinned, and a YouTube link. It runs the same as v1.1. v1.1 (2026-09-30): a smaller workflow, and the new area gets painted on any clip. v1.0 (2026-09-25): first release.Questions or bugs: <a target="_blank" rel="ugc" href="https://github.com/ausboss/ComfyUI-AusBoss/issues">GitHub issues</a> or the comments here. Videos on <a target="_blank" rel="ugc" href="https://www.youtube.com/@ausbossdev">YouTube @ausbossdev</a>. More from me on <a target="_blank" rel="ugc" href="https://x.com/Zanzibased">X @Zanzibased</a> and <a target="_blank" rel="ugc" href="https://github.com/ausboss">GitHub</a>.

LTX 2.3 Video Outpaint

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