Resolve variable links for BGs

src/components/gltf-model-plus.js

@@ -919,6 +919,25 @@ class GLTFMozBehaviorExtension {
           }
         }
       }
+      for (const variable of graph.variables) {
+        const type = variable.valueTypeName;
+        const value = variable.initialValue;
+        if (type && value.index !== undefined) {
+          deps.push(
+            parser.getDependency(type, value.index).then(loadedDep => {
+              if (type === "texture" && !parser.json.textures[value.index].extensions?.MOZ_texture_rgbe) {
+                loadedDep.encoding = THREE.sRGBEncoding;
+              }
+              // Not associated materials don't get their components resolved in GLTFHubsComponentsExtension as they are not referenced by any object
+              if (type === "material" && !loadedDep.userData.gltfExtensions) {
+                loadedDep.userData.gltfExtensions = Object.assign({}, parser.json.materials[value.index].extensions);
+              }
+              value.dep = loadedDep;
+              return loadedDep;
+            })
+          );
+        }
+      }
 
       scenes[0].userData.behaviorGraph = graph;
       return Promise.all(deps);