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LTX Video 2.5 and its derivatives, including LoRAs and fine-tunes, are licensed by Lightricks Ltd. under the LTX-2.x Community License Agreement and must be redistributed under that same agreement, with a copy included. Use is subject to the use restrictions in its Attachment A. Entities with annual revenues of at least $10,000,000 must obtain a paid commercial license from Lightricks before any commercial use.
# LTX-2.5 Two-Stage Seed Hunt Workflow
A ComfyUI workflow for fast seed hunting on LTX-2.5 distilled (22B), using two-stage generation to preview at 0.3 MP (736×416) before upscaling to 1.2 MP (1472×832).
## How it works
STEP 1 – Seed Hunt (4 previews)
- Queue once with four different noise seeds; get four 8-step outputs at 0.3 MP in seconds
- Distilled model + low resolution = ~40-50 seconds per preview
- Compare composition, motion, and timing without the upscale cost
- Change seeds and queue again until you find one you like
STEP 2 – Final Render (chosen seed)
- Copy the winning seed number into the red CHOSEN SEED node
- Un-mute SAVE FINAL (Ctrl+M), mute the green seed-hunt group
- Stage 1 re-runs that seed at 0.3 MP, stage 2 upscales the latent ×2 and re-samples 3 more steps → 1472×832 (1.22 MP)
- Composition and motion carry over faithfully because stage 2 doesn't resample from scratch
## Key features
- KJNodes Set/Get wiring keeps routing clean — rename a Set_* and every Get_* follows
- Shared loaders — models load once, not four times
- No prompt enhancer — prompt goes straight to CLIP encode for clarity and speed
- Resolution flexibility — adjust width/height on the two primitives; stage 2 doubles both automatically
- Supports image-to-video via the bypass_i2v boolean (falses out the input frame for pure T2V)
## What you need
- LTX-2.5 distilled checkpoint ltx-2.5-22b-distilled-transformer-bf16.safetensors)
- Video VAE ltx-2.5-video-vae-bf16.safetensors)
- Audio VAE ltx-2.5-audio-vae-bf16.safetensors)
- Spatial upscaler ltx-2.3-spatial-upscaler-x2-1.1.safetensors)
- Text encoder CLIP gemma4-12b-with-proj-ltx-2.5-bf16.safetensors)
- ComfyUI node pack: comfyui-kjnodes (for Set/Get nodes)
## Tips
- Preview layout is trustworthy — stage 2 upscales the same latent, so seed #1001 produces the exact same composition at both resolutions
- Duration and FPS matter — they cascade through the empty latent and frame count automatically
- Width/height must be divisible by 32
- Try 6–8 seeds before settling on one if the results feel close
Best for: rapid iteration on T2V/I2V prompts where composition matters more than final detail.