The Great Z-Index Struggle: 3D vs. HTML

One of the biggest challenges in building 3D web apps is making the HTML UI play nicely with the 3D scene.

Transparent Canvases

The key is setting your Three.js canvas to be transparent and using absolute positioning for your HTML elements.

Pointer Events

Managing pointer events is also crucial. You need to make sure that clicking on a UI button doesn't accidentally trigger a camera move in your 3D scene.