Question 1

How do I add Draco compression to my glTF files?

Accepted Answer

Use the draco_transcoder command-line tool included in Draco, which compresses meshes in glTF/GLB files with options like -qp for quantization settings. It's integrated into pipelines like glTF-Pipeline for automated workflows.

Question 2

Draco or MeshOpt for Three.js projects?

Accepted Answer

Draco is more established with broader support in glTF and web frameworks like Three.js, offering higher compression ratios for complex meshes. MeshOpt may decode faster for simple meshes, so test based on your specific asset types.

Question 3

Can I use Draco without the GStatic CDN?

Accepted Answer

Yes, you can self-host decoder files by building from source or using the npm package, but this requires managing versions and updates manually, as highlighted in the README's warnings about caching issues.

Question 4

What quantization settings should I use for good quality?

Accepted Answer

Defaults like 11 bits for positions balance size and quality; increase bits (e.g., 14) for higher fidelity or decrease for more compression. The README notes most projects use ~11 bits without noticeable quality loss.

Question 5

How to decode Draco files in a Node.js backend?

Accepted Answer

Use the draco3d npm package which provides Node.js bindings, allowing server-side decoding without browser dependencies. Follow the npm folder documentation for setup and API usage.

Question 6

Does Draco support compressing 3D animations?

Accepted Answer

Partial support exists via Draco Animation code added in v1.3.4, but it's less mature than mesh compression and may require custom integration, with limited examples compared to mesh workflows.

Draco

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