gltf-viewer.donmccurdy.com/ is based on doesn't work with those examples because they have separate asset files.
f3d just worked for it.

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3D computer graphics refer to the creation and representation of three-dimensional images using computer software. Unlike traditional 2D graphics, which represent images on a flat plane, 3D graphics simulate a three-dimensional space, allowing for the visualization of depth, volume, and perspective. Key concepts in 3D computer graphics include: 1. **Modeling**: The process of creating a 3D representation of an object.