Xavier Jack's "Step-by-Step Demo to Interaction in 3D Websites" is essentially a hands-on playground that breaks down why so many 3D sites feel clunky and lifeless, then shows you exactly what to do about it. Instead of just telling you to "add polish," this demo walks through the mechanics of making interactions actually feel good: inertia, bounce, camera movement, magnetic snapping, drag physics. It's the difference between a button that moves and a button that responds. You can step through each concept to see the before/after effect in real time.

The YouTube video that accompanies this demo is titled "This is why most 3D websites suck" and it's worth the watch.

Xavier is a 3D web developer turned founder with serious credits under his belt, having worked with brands like Adidas, HBO, Spotify, and Bottega Veneta. You can find him on X/Twitter, YouTube, TikTok, Instagram, or his portfolio at kmk0.com.

Technically, what makes this interesting is Xavier's focus on "Interaction Feel," which borrows heavily from game design principles. He demonstrates how wiggle bones, shaders, physics-based drag, and micro-interactions combine to make interfaces feel alive rather than just functional. Definitely worth clicking through the demo yourself to see each technique in action. If you're building anything interactive in Three.js or WebGL, give Xavier a follow for a steady stream of experiments and insights.