comfyui-workflows/models/ltx/ltx23-first-last-frame

LTX 2.3 First Last Frame

Summary

LTX 2.3 first-last-frame workflow for controlled transition video generation.

Model Family

• ltx

Status

• imported-only

Source

• Workflow pack page: https://huggingface.co/RuneXX/LTX-2.3-Workflows
• Workflow file: https://huggingface.co/RuneXX/LTX-2.3-Workflows/resolve/main/First-Last-Frame/LTX-2.3_-_FLF2V_First-Last-Frame.json?download=true
• Original publisher: RuneXX
• Date imported: 2026-08-08

Developer notes

• Part of the RuneXX extracted-model workflow pack.
• Includes several attention/sage/memory-efficiency helpers compared with the simpler LTX graphs.

Our notes

• This is one of the most relevant LTX 2.3 workflows for you because first/last-frame control is a practical, non-toy use case.
• It is heavier than the simple single-pass workflows, so it is more of a second-step test after confirming LTX is even workable on the 3070.

Required custom nodes

• ComfyUI-KJNodes
• rgthree-comfy
• attention/memory helper nodes used by the RuneXX pack

Notes

• Best current LTX first-last-frame import in the repo.