Descriptions:
This tutorial from Veteran AI walks through the outpainting capabilities introduced in LTX Video 2.3, showing how to extend AI-generated video clips beyond their original frame — converting vertical footage to widescreen, repositioning story elements, or switching aspect ratios to suit short-form platforms. The workflow runs entirely inside ComfyUI and relies on a dedicated IC LoRA hosted on Hugging Face, loaded via the official ComfyUI LTX Video extension’s IC LoRA Loader node.
The centerpiece of the guide is the VACE Outpaint extension node — originally built for the VACE model but repurposed here for LTX. The node gives creators fine-grained control over exactly where the outpainted region appears, with drag-based positioning, aspect-ratio locking, and quick-snap alignment options. The video also explains an important masking gotcha: LTX’s outpaint LoRA expects black to mark the expansion zone, while most other outpaint tools use white, so an Image Composite Masked step is required to invert the mask before sampling.
The presenter covers failure cases explicitly — videos with aggressive vertical camera pans can produce anatomically incorrect results — and explains why the latent downscale factor used in standard IC LoRA workflows is intentionally skipped here. RunningHub is used as a cloud ComfyUI platform for live demonstration, making the workflow accessible without a local GPU setup. The result is a reproducible, step-by-step reference for anyone looking to push LTX 2.3 beyond simple generation into post-production resizing and scene extension.
📺 Source: Veteran AI · Published April 15, 2026
🏷️ Format: Tutorial Demo
