✨ LTX2/2.3 — Text to video — Simple Workflow
A clean, all-in-one LTX2 text-to-video workflow built entirely with the UmeAiRT Toolkit for ComfyUI.
Only 12 nodes. No spaghetti wires. Just load your model, write your prompt, and hit generate.
⚠️ IMPORTANT — Nodes 2.0 Required
This workflow is built for the Nodes 2.0 (Vue) interface of ComfyUI. If you don't enable it, the workflow may have display problems.
How to activate Nodes 2.0:
Open ComfyUI
Go to Settings (⚙️ icon, bottom-left)
Find "Use Nodes V2 (Vue)" and toggle it ON
Refresh the page
Load the workflow
If you prefer the classic interface, check out my Legacy version of this workflow instead (link).
🎯 Features
Text-to-Image generation
Automatic download of models in auto version
Built-in SeedVR2 upscaler — high-quality tiled upscaling (toggleable on/off) Slower than a classic upscaler, but significantly better quality
Full metadata embedding — your images are saved with all generation parameters, ready for online publishing and remixing
3 LoRA slots — with individual on/off toggles and strength control and you can connect as many other lora modules to each other for as many LoRA as you want.
📦 Custom Node Required
Only one custom node to install:
Install via ComfyUI Manager (search "UmeAiRT") or use the UmeAiRT Auto-Installer.
The Toolkit packages everything internally — upscaler, face detailer, metadata saver. No other custom nodes needed.
📂 Files you need (in manual version)
LTX2.3 :
LTX2 Quant Model: base, fp8, Q8, Q6, Q5, Q4, Q3
In models/unet
GEMMA-3: fp4, Q8, Q6, Q5, Q4, Q3
in models/clip
TEXT ENCODER: ltx-2.3_text_projection_bf16.safetensors
in models/clip
VIDEO VAE: LTX23_video_vae_bf16.safetensors
in models/vae
AUDIO VAE: LTX23_audio_vae_bf16.safetensors
in models/vae
Upscale model: ltx-2.3-spatial-upscaler-x2-1.1.safetensors
in models/latent_upscale_models
LTX2 :
LTX2 Quant Model: Q8, Q6, Q5, Q4, Q3 (i recommend Q5)
In models/unet
MelBandRoFormer : MelBandRoformer_fp32.safetensors
in models/diffusion_models
GEMMA-3: Q8, Q6, Q5, Q4, Q3 (i recommend Q4)
in models/clip
TEXT ENCODER: ltx-2-19b-embeddings_connector_dev_bf16.safetensors
in models/clip
VIDEO VAE: TX2_video_vae_bf16.safetensors
in models/vae
AUDIO VAE: LTX2_audio_vae_bf16.safetensors
in models/vae
Upscale model: ltx-2-spatial-upscaler-x2-1.0.safetensors
in models/latent_upscale_models
Recommanded LoRA:
in models/loras
Description
Base version
FAQ
Comments (7)
Regarding latent upscale. Is it hidden? If not then do you have it at 1.0 by default?
On official workflow it is 0.5 default
You can look in the subgraph.
The generation is done at 0.5 and then upscaled to the chosen resolution.
Both version seem to fail at the generate audio node without uploading custom audio? "activate custom audio import" toggle doesnt seem to work. Let me know if I'm missing something.
You have to import an audio file even if you don't use it
With 24gb vram, GEMMA-3-Q4 is still recommended?
You can try other model but with a 4090 i use LTX2 Q8 and GEMMA3 Q4 and i have good result
After experiencing many problems with ltx-2, I came across your workflows and now I can run it without any issues. Thank you.