add an FbxLayerElementMaterial to each mesh exported

Will need to change the way this is setup when using mulitple materials
per mesh (e.g. won't be able to use all same with only one index)

Author: vkovec

Assets/FbxExporters/Editor/FbxExporter.cs

@@ -254,7 +254,7 @@ public FbxDouble3 GetMaterialColor (Material unityMaterial, string unityPropName
             /// <summary>
             /// Export (and map) a Unity PBS material to FBX classic material
             /// </summary>
-            public FbxSurfaceMaterial ExportMaterial (Material unityMaterial, FbxScene fbxScene)
+            public FbxSurfaceMaterial ExportMaterial (Material unityMaterial, FbxScene fbxScene, FbxMesh fbxMesh)
             {
                 if (Verbose)
                     Debug.Log (string.Format ("exporting material {0}", unityMaterial.name));
@@ -292,6 +292,26 @@ public FbxSurfaceMaterial ExportMaterial (Material unityMaterial, FbxScene fbxSc
                     ExportTexture (unityMaterial, "_SpecGlosMap", fbxMaterial, FbxSurfaceMaterial.sSpecular);
                 }
 
+                // Add FbxLayerElementMaterial to layer 0 of the node
+                FbxLayer fbxLayer = fbxMesh.GetLayer (0 /* default layer */);
+                if (fbxLayer == null) {
+                    fbxMesh.CreateLayer ();
+                    fbxLayer = fbxMesh.GetLayer (0 /* default layer */);
+                }
+
+                using (var fbxLayerElement = FbxLayerElementMaterial.Create (fbxMesh, "Material")) {
+
+                    // Using all same means that the entire mesh uses the same material
+                    fbxLayerElement.SetMappingMode (FbxLayerElement.EMappingMode.eAllSame);
+                    fbxLayerElement.SetReferenceMode (FbxLayerElement.EReferenceMode.eIndexToDirect);
+
+                    FbxLayerElementArray fbxElementArray = fbxLayerElement.GetIndexArray ();
+
+                    // Map the entire geometry to the FbxNode material at index 0
+                    fbxElementArray.Add (0);
+                    fbxLayer.SetMaterials (fbxLayerElement);
+                }
+
                 MaterialMap.Add (materialName, fbxMaterial);
                 return fbxMaterial;
             }
@@ -350,7 +370,7 @@ meshInfo.Vertices [v].z
                     }
                 }
 
-                var fbxMaterial = ExportMaterial (meshInfo.Material, fbxScene);
+                var fbxMaterial = ExportMaterial (meshInfo.Material, fbxScene, fbxMesh);
                 fbxNode.AddMaterial (fbxMaterial);
 
                 /*
@@ -487,7 +507,7 @@ public int ExportAll (IEnumerable<UnityEngine.Object> unityExportSet)
                         fbxManager.SetIOSettings (FbxIOSettings.Create (fbxManager, Globals.IOSROOT));
 
                         // Export texture as embedded
-                        fbxManager.GetIOSettings ().SetBoolProp (Globals.EXP_FBX_EMBEDDED, true);
+                        //fbxManager.GetIOSettings ().SetBoolProp (Globals.EXP_FBX_EMBEDDED, true);
 
                         // Create the exporter
                         var fbxExporter = FbxExporter.Create (fbxManager, "Exporter");