Blending Dimensions
This technique enables seamless integration of WebGL 3D graphics with traditional HTML content. Objects can appear both in front of and behind HTML elements, creating immersive experiences that blur the line between web content and 3D worlds.
The system uses dual WebGL renderers with synchronized camera positioning, allowing 3D elements to exist in the same coordinate space as your scrollable document.
Technical Features
Dual Renderer System
Background and foreground canvases with depth-aware clipping for proper occlusion.
Scroll Synchronization
Camera position tracks page scroll, maintaining spatial coherence.
Element Mapping
HTML elements can be represented and interacted with in 3D space.
Pixel-Perfect Scale
Forced pixels-per-meter ensures consistent sizing across viewports.
How It Works
// Split rendering by depth threshold const depthThreshold = 5.0; // Background pass: objects beyond threshold camera.near = depthThreshold; camera.far = 1000; rendererBg.render(scene, camera); // Foreground pass: objects closer than threshold camera.near = 2.0; camera.far = depthThreshold + 0.01; rendererFg.render(scene, camera);
By adjusting near and far clipping planes between render passes, objects automatically sort themselves relative to the HTML layer without manual depth management.
By The Numbers
Keyboard Shortcuts
Toggle between rendering modes to see how the overlay system works.
Use Cases
Product showcases where 3D models float alongside specifications. Interactive articles with embedded visualizations. Portfolio sites that blend creativity with content. Data dashboards with dimensional charts that extend beyond the screen.
The technique works anywhere traditional web layouts need a touch of dimensional magic while preserving accessibility and SEO benefits of semantic HTML.