How to Install LTX 2.3 with ComfyUI (Easy Setup)

Summary of the “How to Install LTX 2.3 with ComfyUI (Easy Setup)” subtitles

This tutorial walks through an easy, portable setup of ComfyUI and LTX 2.3 (an open-source video generation engine). It covers installing a workflow, fixing missing nodes, downloading required models, and a workaround for a specific error.

---

Step-by-step install & setup (ComfyUI Portable + Manager)

1. Download ComfyUI Portable from GitHub (via the link shown on screen).
2. Extract the downloaded ZIP into a folder.
3. Open the extracted folder “ComfyUI Windows Portable”.
4. Run run-nvidia-gpu.bat to start ComfyUI.
5. Update ComfyUI:
   • Run update-comfyui.bat from the update folder (may take a while).
6. Install ComfyUI Manager (portable version):
   • Download and install Git (default options).
   • Save scripts/install-manager-for-portable-version.bat from the ComfyUI Manager GitHub page into the ComfyUI portable folder.
   • Run that .bat to install the manager.
7. Close all ComfyUI windows (browser + command prompt), then restart ComfyUI.
8. Verify that the Manager appears in the UI.

---

Load workflow + fix missing custom nodes

1. Download the workflow from the video description (first link).
2. Open ComfyUI and load the workflow.
3. If red nodes appear (missing dependencies):
   • In ComfyUI Manager, select “Install Missing Custom Nodes”
   • Choose all and click install
   • Refresh the browser and confirm the red node issues are gone.

---

Install Crystools for monitoring

• In the Manager, install Crystools to display a status bar with system metrics, useful for tracking performance and potential issues.

---

Download required models (LTX 2.3)

• From the video description, download models and place them into the correct folders:
  • Start with the LTX 2.3 main model → put into Diffusion Models
  • Download remaining models → place into their respective model folders
• After models are installed, run the workflow using the default prompt.

---

Error handling: “ClipTextEncode” fix

If you hit a ClipTextEncode error:

1. Update ComfyUI in the Manager.
2. Run dependency update from the Update folder inside the ComfyUI_portable directory.
3. Restart ComfyUI.

---

Running the workflow

• After setup, the workflow should auto-select the correct sampler group and generate a cinematic video output.
• The tutorial references an “LTX 2.3 All-In-One Workflow” video for additional exploration.

---

Main speakers/sources

• Fututek (channel mentioned in the intro; the tutorial creator)
• GitHub sources for:
  • ComfyUI Portable
  • ComfyUI Manager
  • Crystools
  • The workflow and model downloads referenced from the video description links