ComfyUI tutorial: LTX 2.3 and Flux 2 Klein movies

This tutorial explains a ComfyUI workflow for making short films one shot at a time. Flux 2 Klein generates reference-based start frames, while LTX 2.3 generates video and audio. The presenter uses LTX's audio-reference ID-LoRA to keep character voices consistent and demonstrates recasting a protagonist by replacing the character images and voice sample, then regenerating the shots.

Setup covers importing the free workflow, installing missing custom nodes, updating ComfyUI and placing models in the folders indicated by the loader notes. The presenter suggests GGUF versions for limited VRAM, with some loss of quality, and 720p as a starting resolution. A RunPod template provides a cloud option. He describes Klein 4B as lighter and licensed for commercial use, while 9B requires a license for commercial use.

The local AI workflow starts with a face close-up and full-body reference. Each shot accepts up to four references, including environments or props. The walkthrough covers prompt and seed adjustments, native-resolution generation versus upscaling, shot duplication and optional color matching. An asset group accepts sketches to guide prop design.

The advanced workflow adds seamless 360° environments and background crops for shot reverse shot scenes. The final assembler follows the chosen shot order and can export individual clips for editing in DaVinci Resolve. The base workflow is free; the advanced version and additional examples require Patreon support.