Draco solves the bandwidth problem of web 3D. A detailed product model can easily be 20 MB or more uncompressed, which is too much for fast loading on a mobile network. Draco compresses the geometry (vertices, normals, UVs, indices) into a form that is typically a third of the original size, sometimes smaller, without losing visual quality at typical web display sizes.
The integration is clean. Draco lives inside the glTF/GLB file as the KHR_draco_mesh_compression extension, so the model stays standards-based and works in any glTF 2.0 renderer that supports the extension. Blender, the most common authoring tool, exports Draco-compressed GLB natively: you tick a checkbox at export time. Google’s model-viewer decodes Draco automatically in the browser, and the same applies in Three.js with the DracoLoader.
For a WordPress site, the practical impact is faster load times. A 12 MB uncompressed product GLB might end up at 3 to 4 MB with Draco, and the user sees the model that much sooner. Core Web Vitals (particularly Largest Contentful Paint) benefit measurably. PausAR Viewer handles Draco-encoded GLB files transparently: once the file is uploaded, the plugin’s underlying model-viewer decodes it at runtime, with no extra setup.
| Property | Without Draco | With Draco |
|---|---|---|
| Typical file size (detailed product) | 10 to 20 MB | 3 to 7 MB |
| Initial load on mobile network | Slow | Substantially faster |
| Decode overhead in browser | None | Small (one-time, at load) |
| Visible quality at web size | Original | No visible loss |
| Renderer support | Universal | Universal in modern glTF viewers |
At typical web display sizes, no visible loss. Draco is a lossy compression algorithm tuned for 3D mesh data, with parameters that let you trade compression strength against accuracy. Default settings are designed for the web and AR use case.
No. Export your GLB from Blender with the Draco checkbox enabled, then upload it to the PausAR Viewer Elementor widget. The plugin's model-viewer renderer decodes Draco automatically.
Typical reductions are to one third of the original size. The exact ratio depends on the geometry complexity and the Draco compression level. A 12 MB product GLB usually ends up at 3 to 5 MB.
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