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このセクションでは、前のステップで作成したステレオ画像を表示するマテリアルの作成および設定をします。

1. プロジェクトを保存したフォルダを開いて、前の手順で作成したステレオ画像を検索し、 StereoPanoramaImages\Saved\StereoPanorama(Date & Time it was taken) を開きます。

   画像をクリックしてフルサイズで表示

2. 画像を見つけたら、両方とも選択して Windows のその場所から UE4 プロジェクトへ画像をインポートするコンテンツ ブラウザへドラッグします。

   画像をクリックしてフルサイズで表示

3. 両方とも画像がインポートされたら、両方の画像をダブルクリックしてテクスチャ ビューアで開きます。開いたら、 [Level Of Detail] セクションの [Mip Gen Settings] を [From Texture Group] から [No Mipmaps] へ変更します。

   画像をクリックしてフルサイズで表示

   この変更をし忘れると、このテクスチャとカメラ間の距離が原因で、ステレオ表示にするとテクスチャに継ぎ目が表示されてしまいます。

4. そこで、コンテンツ ブラウザを右クリックして、 [Create Basic Asset (基本アセットを作成)] セクションから[Material] オプションをクリックして、新規作成したマテリアルに 「MAT_StereoViewer」 という名前を付けます。

   クリックしてフルサイズで表示

5. MAT_StereoViewer Material をダブルクリックして開き、 [Details (詳細)] パネルで以下のオプションを設定します。

   • Shading Model:Unlit

   • Fully Rough:True

   • Use Full Precision:True

   • Use LIghtmap Directionality:False

6. 次にそれぞれの [Copy Material Expression Graph] オプションをクリックして、付けられているテキストをコピーして、マテリアル エディタにペーストします。マテリアル グラフにテキストをペーストしたら、 If ノードの出力がメイン マテリアル ノードの Emissive Color のへ接続されていることを確認します。完了すると、このようになります。

   Copy Expression Graph

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      Begin Object Class=MaterialExpressionIf Name="MaterialExpressionIf_0"
      End Object
      Begin Object Name="MaterialExpressionIf_0"
         A=(Expression=MaterialExpressionMaterialFunctionCall'MaterialGraphNode_2.MaterialExpressionMaterialFunctionCall_0')
         B=(Expression=MaterialExpressionConstant'MaterialGraphNode_1.MaterialExpressionConstant_0')
         AGreaterThanB=(Expression=MaterialExpressionTextureSampleParameter2D'MaterialGraphNode_7.MaterialExpressionTextureSampleParameter2D_0',Mask=1,MaskR=1,MaskG=1,MaskB=1)
         ALessThanB=(Expression=MaterialExpressionTextureSampleParameter2D'MaterialGraphNode_8.MaterialExpressionTextureSampleParameter2D_1',Mask=1,MaskR=1,MaskG=1,MaskB=1)
         MaterialExpressionEditorX=64
         MaterialExpressionEditorY=144
         MaterialExpressionGuid=81A589084F901693C24D6188C7E9963C
         Material=PreviewMaterial'/Engine/Transient.MAT_Stereo_Image'
      End Object
      MaterialExpression=MaterialExpressionIf'MaterialExpressionIf_0'
      NodePosX=64
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      NodeGuid=5B7FA1FE457D602E7A7E578891582634
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   End Object
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      Begin Object Class=MaterialExpressionIf Name="MaterialExpressionIf_0"
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      Begin Object Name="MaterialExpressionConstant_0"
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   End Object
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      Begin Object Class=MaterialExpressionMaterialFunctionCall Name="MaterialExpressionMaterialFunctionCall_0"
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      Begin Object Name="MaterialExpressionMaterialFunctionCall_0"
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         MaterialExpressionGuid=0DB6A16C443E70F09CC35BAA076DD2C3
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   End Object
   Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_3"
      Begin Object Class=MaterialExpressionScreenPosition Name="MaterialExpressionScreenPosition_0"
      End Object
      Begin Object Name="MaterialExpressionScreenPosition_0"
         MaterialExpressionEditorX=-448
         MaterialExpressionEditorY=-32
         MaterialExpressionGuid=F5C4FBB24FB4BE834B8623BAD82AA1FF
         Material=PreviewMaterial'/Engine/Transient.MAT_Stereo_Image'
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   End Object
   Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_4"
      Begin Object Class=MaterialExpressionMultiply Name="MaterialExpressionMultiply_0"
      End Object
      Begin Object Name="MaterialExpressionMultiply_0"
         A=(Expression=MaterialExpressionCameraVectorWS'MaterialGraphNode_5.MaterialExpressionCameraVectorWS_0')
         B=(Expression=MaterialExpressionVectorParameter'MaterialGraphNode_9.MaterialExpressionVectorParameter_0',Mask=1,MaskR=1,MaskG=1,MaskB=1)
         MaterialExpressionEditorX=-720
         MaterialExpressionEditorY=304
         MaterialExpressionGuid=4F10B53C4ECBDE27F4BD38B46FACAD18
         Material=PreviewMaterial'/Engine/Transient.MAT_Stereo_Image'
         bCollapsed=False
      End Object
      MaterialExpression=MaterialExpressionMultiply'MaterialExpressionMultiply_0'
      NodePosX=-720
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      NodeGuid=630A92064469FB428330238D474586C7
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      CustomProperties Pin (PinId=F1DE55B14567D0B67759DEA9C934BA05,PinName="B",PinType.PinCategory="optional",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_9 9C23E1264DF642DC356B788B08CB3693,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
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   End Object
   Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_5"
      Begin Object Class=MaterialExpressionCameraVectorWS Name="MaterialExpressionCameraVectorWS_0"
      End Object
      Begin Object Name="MaterialExpressionCameraVectorWS_0"
         MaterialExpressionEditorX=-912
         MaterialExpressionEditorY=256
         MaterialExpressionGuid=BA70FEF141C3FC6429AA56B337E6F88C
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   End Object
   Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_6"
      Begin Object Class=MaterialExpressionMaterialFunctionCall Name="MaterialExpressionMaterialFunctionCall_1"
      End Object
      Begin Object Name="MaterialExpressionMaterialFunctionCall_1"
         MaterialFunction=MaterialFunction'/Engine/Functions/Engine_MaterialFunctions01/Coordinates/LongLatToUV.LongLatToUV'
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         MaterialExpressionGuid=2B540AED4336652F5CC59D9DF979B358
         Material=PreviewMaterial'/Engine/Transient.MAT_Stereo_Image'
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      NodeGuid=3A24EE65400825A12AE9DC844E79E18F
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         ParameterName="Left_Eye"
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   End Object
   Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_8"
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         ParameterName="Right_Eye"
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      CustomProperties Pin (PinId=CDF923064C8491C8DD875A9FD733B329,PinName="Output",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_0 F937930D47BA8EA98B9510B0C025B9A4,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
      CustomProperties Pin (PinId=F4A512534340958957BAC39A44E565FF,PinName="Output2",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="red",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
      CustomProperties Pin (PinId=0080AD0C498AB9A1D974ED80486A3FEE,PinName="Output3",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="green",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
      CustomProperties Pin (PinId=1B4746BE460A06F7E4C99091F01E070D,PinName="Output4",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="blue",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
      CustomProperties Pin (PinId=2059FDD14284DE0A16798E92259F2C7A,PinName="Output5",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="alpha",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
   End Object
   Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_9"
      Begin Object Class=MaterialExpressionVectorParameter Name="MaterialExpressionVectorParameter_0"
      End Object
      Begin Object Name="MaterialExpressionVectorParameter_0"
         DefaultValue=(R=1.000000,G=-1.000000,B=-1.000000,A=1.000000)
         ParameterName="Image_Direction"
         ExpressionGUID=F1F2C7C348FA6F958EA8E099B55A37ED
         MaterialExpressionEditorX=-912
         MaterialExpressionEditorY=384
         MaterialExpressionGuid=6873E4014A670FD8059959BFE93D5CDA
         Material=PreviewMaterial'/Engine/Transient.MAT_Stereo_Image'
      End Object
      MaterialExpression=MaterialExpressionVectorParameter'MaterialExpressionVectorParameter_0'
      NodePosX=-912
      NodePosY=384
      bCanRenameNode=True
      NodeGuid=37303B2F48466367CBE440A181DB2539
      CustomProperties Pin (PinId=9C23E1264DF642DC356B788B08CB3693,PinName="Output",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_4 F1DE55B14567D0B67759DEA9C934BA05,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
      CustomProperties Pin (PinId=6B8E6BCA4EF15BDF5D11B6B1CB4B1882,PinName="Output2",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="red",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
      CustomProperties Pin (PinId=4F58ABD7410B38EA9235A497F25BD3C1,PinName="Output3",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="green",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
      CustomProperties Pin (PinId=252E95C9465BAEED4430B5B9DA37851D,PinName="Output4",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="blue",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
      CustomProperties Pin (PinId=B5B286C94A078205748BA1880BD0B1D1,PinName="Output5",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="alpha",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
   End Object

7. ビューア Material の設定および接続が完了したので、コンテンツ ブラウザで右目用と左目用のテクスチャを検索し、テクスチャを対応する目のテクスチャ入力にロードして、 [Apply] と [Save] ボタンを押して、そのマテリアルをコンパイルします。

   クリックしてフルサイズで表示

これでマテリアルの設定が完了し、使用できる状態になりました。次のセクションでは、レベルの実行時にマテリアルを表示するレベルの設定方法を説明します。