LTX 2.3 高阶控图：首帧 + 中间帧 + 尾帧精准控制教程

Editor's Note: This tutorial dives deep into LTX 2.3's advanced multi-frame control system, covering how to use Inplace and Add Guide Multi nodes in ComfyUI.

Overview

LTX 2.3 ships with powerful frame-conditioning nodes that go beyond simple first/last frame control. This tutorial covers the advanced reference generation system.

Key Nodes

Add Guide Multi

Accepts multiple conditioning images at specific frame positions — first, middle, and last frames.

Inplace Node

Locks specific frames in latent space for stronger adherence at the cost of some motion flexibility.

Inplace vs Add Guide Multi:

• Add Guide Multi — softer conditioning, better motion flow
• Inplace — harder constraint, reference appears nearly exactly

Frame Position Guidelines

• Frame positions are 0-indexed
• Total frame count must be 8n+1 (25, 49, 97...)
• For 49 frames: first=0, middle=24, last=48

Practical Tips

1. For scene transitions: place a middle keyframe at the transition point
2. For character consistency: Inplace for first frame, Add Guide for middle/last
3. All reference images must match target resolution (divisible by 32)

Sources

• Bilibili: 如何完美驾驭 LTX 2.3？
• LTX-2.3 ComfyUI Workflow Examples