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Every LTX 2.5 mode in one workflow, picked from one dropdown. Text to video, image to video, first+last frame, pose control, and Lightricks' 12 VFX LoRAs: remove a person, day to night, add water, alpha matte, layout to render. Video comes out with sound.

What you need

✔ Custom nodes — None. Core ComfyUI only.
✔ ComfyUI version — 0.45.0 or newer (for the RelayVSR nodes). On 0.44 use the v3.1.1 file in source/.
✔ VRAM — 12 GB — tested, not estimated
✔ System RAM — 16–19 GB peak
✔ Tested on — RTX 3060 12 GB · 32 GB RAM · ComfyUI 0.45.0
✔ Licence — Workflow MIT · LTX 2.5 and the LoRAs: LTX-2.x Community Licence

Models to download

Click a file name to download it. Put it in the folder shown, inside ComfyUI/models/. Every loader in the workflow also carries its own link, so ComfyUI's missing-models panel gives you a Download button per file.

Required — 8 files, about 39.7 GB

diffusion_models/

File: ltx-2.5-22b-distilled-transformer-nvfp4.safetensors — 18.7 GB (12 GB (tested))
Download:
https://huggingface.co/Lightricks/LTX-2.5/resolve/main/diffusion_models/ltx-2.5-22b-distilled-transformer-nvfp4.safetensors

Put it here:
ComfyUI/models/diffusion_models/

File: rt_detr_v4-x-hgnet_fp16.safetensors — 0.1 GB (Pose mode)
Download:
https://huggingface.co/Comfy-Org/SDPose/resolve/main/diffusion_models/rt_detr_v4-x-hgnet_fp16.safetensors

Put it here:
ComfyUI/models/diffusion_models/

text_encoders/

File: gemma4-12b-with-proj-ltx-2.5-comfy-int8-convrot.safetensors — 15.4 GB (all modes)
Download:
https://huggingface.co/Lightricks/LTX-2.5/resolve/main/text_encoders/gemma4-12b-with-proj-ltx-2.5-comfy-int8-convrot.safetensors

Put it here:
ComfyUI/models/text_encoders/

vae/

File: ltx-2.5-video-vae-bf16.safetensors — 1.5 GB (all modes)
Download:
https://huggingface.co/Lightricks/LTX-2.5/resolve/main/vae/ltx-2.5-video-vae-bf16.safetensors

Put it here:
ComfyUI/models/vae/

File: ltx-2.5-audio-vae-bf16.safetensors — 0.4 GB (all modes)
Download:
https://huggingface.co/Lightricks/LTX-2.5/resolve/main/vae/ltx-2.5-audio-vae-bf16.safetensors

Put it here:
ComfyUI/models/vae/

latent_upscale_models/

File: ltx-2.5-latent-spatial-upscaler-x2-bf16-1.0.safetensors — 1.0 GB (T2V / I2V)
Download:
https://huggingface.co/Lightricks/LTX-2.5/resolve/main/latent_upscale_models/ltx-2.5-latent-spatial-upscaler-x2-bf16-1.0.safetensors

Put it here:
ComfyUI/models/latent_upscale_models/

loras/

File: ltx-2.3-22b-ic-lora-union-control-ref0.5.safetensors — 0.7 GB (Pose mode)
Download:
https://huggingface.co/Lightricks/LTX-2.3-22b-IC-LoRA-Union-Control/resolve/main/ltx-2.3-22b-ic-lora-union-control-ref0.5.safetensors

Put it here:
ComfyUI/models/loras/

checkpoints/

File: sdpose_wholebody_fp16.safetensors — 1.9 GB (Pose mode)
Download:
https://huggingface.co/Comfy-Org/SDPose/resolve/main/checkpoints/sdpose_wholebody_fp16.safetensors

Put it here:
ComfyUI/models/checkpoints/

The LTX 2.5 files and every LoRA need Agree and access on their Lightricks page first, logged in to Hugging Face.

VFX LoRAs — optional, download only the ones you use. All go in loras/.

• Clean Plate — clean-plate-1.0, 0.33 GB

• Day To Night — day-to-night-0.9, 0.33 GB

• Water Simulation — water-simulation-0.9, 0.91 GB

• Deblur — deblur-0.9, 0.91 GB

• Decompression — decompression-0.9, 0.91 GB

• Colorization — colorization-0.9, 0.91 GB

• Alpha matte — alpha-gen-0.9, 1.31 GB

• Restore — restore-1.0, 1.71 GB

• Refine Details — refine-details-1.0, 1.31 GB

• Pixel upscaler x2 — pixel-spatial-upscaler-x2-1.0, 0.33 GB

• Layout to Render — layout-to-render-1.0, 1.31 GB

• Ingredients — ingredients-0.9, 1.31 GB

• Cinemagraph — cinemagraph-0.9, 0.20 GB

• Slow motion — slow-motion-control-1.0, 0.65 GB

RelayVSR x2 — only for the RelayVSR switch. Needs ComfyUI 0.45.0+.

diffusion_models/

File: relayvsr_x2_lightx2v_int8_convrot.safetensors — 5.16 GB
Download:
https://huggingface.co/Comfy-Org/RelayVSR/resolve/main/diffusion_models/relayvsr_x2_lightx2v_int8_convrot.safetensors

Put it here:
ComfyUI/models/diffusion_models/

vae/

File: relayvsr_flash_vae_x2_fp32.safetensors — 0.13 GB
Download:
https://huggingface.co/Comfy-Org/RelayVSR/resolve/main/vae/relayvsr_flash_vae_x2_fp32.safetensors

Put it here:
ComfyUI/models/vae/

Modes

One MODE dropdown, and each path only runs when you pick it:

T2V · I2V (first frame) · First + last frame · Pose control (IC-LoRA Union) · VFX video to video (12 LoRAs) · Layout to Render · Ingredients · Cinemagraph · Slow motion

Two switches change speed and size: LTX x2 upscale (on by default) and RelayVSR x2 (off by default).

Speed on my RTX 3060

T2V, 4 s, Megapixels 0.5, models already loaded, a new seed per run:

• on (default) — off relayvsr x2, 960x512 result, 1:19 wall, 11.1 GB peak vram

• off — off relayvsr x2, 480x256 result, 0:35 wall, 11.3 GB peak vram

• off — on relayvsr x2, 960x512 result, 0:43 wall, 11.1 GB peak vram

• on — on relayvsr x2, 1920x1024 result, 1:41 wall, 11.3 GB peak vram

Peak VRAM barely changes with the switches: the loaded LTX model itself fills the 12 GB. The off switch buys time, not VRAM headroom.

Every mode run once at 960x512, 4 s: T2V 1:43 · I2V 2:00 · First+last 2:32 · Pose 3:44 · Clean Plate 3:27 · Layout to Render 3:30 · Cinemagraph 1:49 · Slow motion 1:49.

What did not work

• Ingredients: 9 of 9 runs kept the reference sheet's panel grid instead of making one shot.

• Decompression invents text, so don't put screen recordings through it.

• Layout to Render needs the First frame. Without one you get grey clay back.

• Slow motion: use speed 0.2. 0.05 was not slower.

• Strength above 1 did not help Cinemagraph, Slow motion or Ingredients.

Strengths I settled on: Clean Plate 1.2 and name the person if they are sitting in shot · Colorization 1.3, at 1.0 the colour is dull and fades · Day to Night 1.0 with people moving · Water 1.0 at 1280x704 · everything else 1.0.

Get the workflow

• GitHub: https://github.com/Thefrizzy1/The_frizzy1-Workflows/tree/main/workflows/ltx/ltx-2.5-ultimate-12gb

• Hugging Face mirror: https://huggingface.co/The-frizzy1/The_frizzy1-Workflows/tree/main/workflows/ltx/ltx-2.5-ultimate-12gb

More videos on this stuff: https://www.youtube.com/playlist?list=PLQ3PcJNbU2Ls