This background is a 25-frame video loop produced by ComfyUI running Stable Video Diffusion XT on the HP Z4. Everything you see moving is one model, one GPU, zero cloud calls.
The page you are looking at feels alive because of three separate things. ComfyUI only generates one of them. The other two are web-native animation.
The drifting lake reflection behind the hero. This is the part ComfyUI actually makes: image-to-video via SVD-xt, rendered as a seamless loop.
ComfyUI · SVD-xtSections that fade and slide in as you scroll, the parallax shade, the animated scroll hint. Pure CSS and JavaScript, no diffusion involved.
CSS · IntersectionObserverNav bar that gains a blur on scroll, buttons that lift on hover. Standard web UI behavior you write by hand.
CSS · DOMPulled directly from ComfyUI's history endpoint after the job completed. No estimates.
Local generation runs on hardware you already own. Here is the same 3.125-second output priced against hosted providers.
| Where | Model | Rate | This clip |
|---|---|---|---|
| z4-01 (self-hosted) | SVD-xt | ~350W · $0.15/kWh | ~$0.002 |
| Replicate | Wan 2.1 i2v (480p) | $0.09/sec output | $0.28 |
| Replicate | Wan 2.1 i2v (720p) | $0.25/sec output | $0.78 |
Replicate prices from replicate.com/pricing (retrieved Sep 2026). SVD-xt is deprecated on Replicate, so the nearest hosted image-to-video equivalent (Wan 2.1) is used. Local electricity cost assumes ~350W draw for 104 seconds at $0.15/kWh. The real advantage of self-hosting is not the per-clip pennies — it is unlimited iterations with no per-job meter.