public void setTextureMapping(String ogreTexAlias, String jmeTexParam){
        textureMappings.put(ogreTexAlias, jmeTexParam);
    }
Set mapping from an Ogre3D base material texture alias to a
jME3 texture param
@param ogreTexAlias The texture alias in the Ogre3D base material
@param jmeTexParam The texture param name in the jME3 material definition.
jme3-plugins/src/ogre/java/com/jme3/scene/plugins/ogre/matext/MaterialExtension.java