From e3ed40ffcd103836f73ab6565ed27b61fcc4cb0c Mon Sep 17 00:00:00 2001
From: ousttrue <ousttrue@gmail.com>
Date: Tue, 28 Jul 2020 15:44:52 +0900
Subject: [PATCH] =?UTF-8?q?=E7=A9=BA=E3=81=AE=E3=83=9E=E3=83=86=E3=83=AA?=
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---
 Assets/VRM/UniGLTF/Scripts/IO/gltfExporter.cs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Assets/VRM/UniGLTF/Scripts/IO/gltfExporter.cs b/Assets/VRM/UniGLTF/Scripts/IO/gltfExporter.cs
index c60cc83a6..e0605a9d0 100644
--- a/Assets/VRM/UniGLTF/Scripts/IO/gltfExporter.cs
+++ b/Assets/VRM/UniGLTF/Scripts/IO/gltfExporter.cs
@@ -280,7 +280,11 @@ namespace UniGLTF
                         ExportOnlyBlendShapePosition, removeVertexColor))
                 {
                     gltf.meshes.Add(gltfMesh);
-                    MeshBlendShapeIndexMap.Add(mesh, blendShapeIndexMap);
+                    if (!MeshBlendShapeIndexMap.ContainsKey(mesh))
+                    {
+                        // 同じmeshが複数回現れた
+                        MeshBlendShapeIndexMap.Add(mesh, blendShapeIndexMap);
+                    }
                 }
                 Meshes = unityMeshes.Select(x => x.Mesh).ToList();
                 #endregion