Hero Section With Animated Clouds

The only hero in this category that runs on a real canvas. Three.js has to load, a shader has to compile, and only then does the first cloud band appear, which on a mid range phone is a pause you can feel. Everything else here paints with the stylesheet. Knowing that is the whole decision: buy the atmosphere when the atmosphere is part of what you are selling, and skip it when it is scenery.

What you get for the cost is weather that never repeats, drifting from sky blue by day to deep navy at night, with a scrim under the copy so the text stays readable as the bands move beneath it. If it has to sit above the fold, put a still image behind the canvas so there is something on screen while the renderer starts, and check it once on a throttled connection before you decide it was worth it.