Loop Forge

Wave over the steps

Works, from LTX 2.5 Creative Lab LoRAs, tested locally

Frame from the Dry source result
Dry source
Frame from the Water LoRA, 1.3 result
Water LoRA, 1.3
Watch it in the video at 8:33
LoRA
Water Simulation at 1.3
Output
1152×640, 121 frames at 24fps
Sampling
8 steps, euler_ancestral
Seed
42
Generated in
10 min
Peak VRAM
11.2 GiB
Ran on
RTX 3060, 12GB (local)

What was wired in

Works

Spray bursts over the balustrade and a shallow wave washes over the lower steps. The way the water meets the steps looked more natural than I expected.

Reference shows a man in a grey suit and brown leather shoes walking down a wide flight of dry sandstone steps in a sunlit courtyard toward the camera, a stone balustrade on his left and a row of arched windows behind him. Edited shows the same scene with water added. ADD WATER a wave of foaming seawater surging across the courtyard from the left, washing up over the lower steps and crashing around his legs at knee height, spray flying off the balustrade. Subject identity, clothing, framing, and background geometry are identical to the reference; only water-related elements differ between reference and edited.

Notes

At 1152×640 it needed strength 1.3. At 1.0 the water barely showed.

The Water Simulation LoRA on Hugging Face

Run it yourself

Download everything for this test (.zip, 0.8 MB). It holds the workflow, every input it loads and a README. Copy the inputs into ComfyUI/input, put the models below in place and drag the workflow onto ComfyUI.

The Lightricks repositories (the LTX 2.5 base model and the LoRAs) are gated. Log in to Hugging Face and accept the terms on each repository page before downloading.

Custom nodes: ComfyUI-LTXVideo at commit 3bf3ca6. Everything else is part of ComfyUI 0.37.0 (commit 0f74f7fb, frontend 1.53.6).