Add required options for material instance importing.

Source/Engine/Tools/ModelTool/ModelTool.Options.cpp

@@ -61,6 +61,8 @@ void ModelTool::Options::Serialize(SerializeStream& stream, const void* otherObj
     SERIALIZE(LODCount);
     SERIALIZE(TriangleReduction);
     SERIALIZE(ImportMaterials);
+    SERIALIZE(ImportMaterialsAsInstances);
+    SERIALIZE(InstanceToImportAs);
     SERIALIZE(ImportTextures);
     SERIALIZE(RestoreMaterialsOnReimport);
     SERIALIZE(GenerateSDF);
@@ -102,6 +104,8 @@ void ModelTool::Options::Deserialize(DeserializeStream& stream, ISerializeModifi
     DESERIALIZE(LODCount);
     DESERIALIZE(TriangleReduction);
     DESERIALIZE(ImportMaterials);
+    DESERIALIZE(ImportMaterialsAsInstances);
+    DESERIALIZE(InstanceToImportAs);
     DESERIALIZE(ImportTextures);
     DESERIALIZE(RestoreMaterialsOnReimport);
     DESERIALIZE(GenerateSDF);

Source/Engine/Tools/ModelTool/ModelTool.h

@@ -11,6 +11,7 @@
 #include "Engine/Graphics/Models/ModelData.h"
 #include "Engine/Graphics/Models/SkeletonData.h"
 #include "Engine/Animations/AnimationData.h"
+#include <Engine/Content/Assets/Material.h>
 
 class JsonWriter;
 
@@ -247,6 +248,8 @@ public:
 
         // Materials
         bool ImportMaterials = true;
+        bool ImportMaterialsAsInstances = false;
+        Guid InstanceToImportAs;
         bool ImportTextures = true;
         bool RestoreMaterialsOnReimport = true;