Is there a callback function for materials when loading a file?

[BlackMojito]

I am currently working on importing an OBJ files into my Scene. It seems that the onSuccess callback for BABYLON.SceneLoader.ImportMesh is done before the material are loading. I have a special process for all the imported materials. So my question is do I have a chance (callback) for process the loaded materials? 

In the below code, the if (originalMaterial...) line is never hit but I can enter the  _parseMTL function when I load OBJ and the materials can be correctly rendered.

importModel(rootUrl: string, sceneFileName: string): void {
        let onModelImport = (meshes: BABYLON.AbstractMesh[]) => {
            for (let mesh of meshes) {
                this._selectionManager.enableHighlight(mesh);

                let originalMaterial = mesh.material;
                if (originalMaterial instanceof BABYLON.StandardMaterial) {
                    let key = MaterialManager.materialKeyString(rootUrl + sceneFileName, originalMaterial.name);
                    let cachedMaterial = this._materialManager.getMaterial(key);
                    if (cachedMaterial) {
                        mesh.material = cachedMaterial;
                    } else {
                        let enhancedMaterial = this._materialManager.enhanceStandardMaterial(key, originalMaterial as BABYLON.StandardMaterial);
                        mesh.material = enhancedMaterial;
                    }
                }
            }
        };

        this._renderScene.importModel(rootUrl, sceneFileName, onModelImport);
        this.parseSceneOptions();
    }

 

[GameMonetize]

Hello, OBJ is an interesting beast as geometry and materials are separated files

You can rely on scene.executeWhenReady(func(){}) to start rendering when everything is ready