GLB Export Error with Compressed Textures

It appears you're encountering an issue when trying to export a GLB model that contains compressed textures using the Three.js Editor. The error message indicates a problem with handling the compressed texture format during the export process.

Possible Solutions

The GLTFExporter in Three.js might have limitations when dealing with certain compressed texture formats. Here are some suggestions to resolve this issue:

1. Use uncompressed textures: If possible, try using the original uncompressed texture versions in your model before exporting.

2. Pre-process your model: You might need to convert the compressed textures to a format that the GLTFExporter supports before attempting to export.

3. Use a different exporter: Three.js provides several exporters that might handle your case better:

   • GLTFExporter (which you're currently using)
   • OBJExporter
   • PLYExporter
   • STLExporter
   • DRACOExporter (for compressed geometry)

4. Check texture compatibility: Ensure that the compressed texture format in your model is compatible with the GLTFExporter. Some specialized formats might not be supported.

5. Update Three.js: If you're working with a local copy, make sure you're using the latest version of Three.js and its exporters.

If you need more specific help, you might want to provide details about the compressed texture format you're using in your model.