code: function GLTFTextureDDSExtension() {
  
  		if ( ! THREE.DDSLoader ) {
  
  			throw new Error( 'THREE.GLTFLoader: Attempting to load .dds texture without importing THREE.DDSLoader' );
  
  		}
  
  		this.name = EXTENSIONS.MSFT_TEXTURE_DDS;
  		this.ddsLoader = new THREE.DDSLoader();
  
  	}
docs: DDS Texture Extension
  
  Specification:
  https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Vendor/MSFT_texture_dds