虚幻四 搭建场景

用UE4预设素材搭建如图所示的场景

概述

在这儿场景搭建中，使用Epic公司的虚幻引擎四以及不久前刚被Epic公司收购的Quixel公司的系列软件。


重点用到的软件

  • Uereal Engine 4.25
  • Quixel Studio 2020.3
  • Quixel MegaScans 2020.3
  • Adobe Photoshop cc 2020
  • Autodesk Maya 2020.1

这次全部的过程基于节点和蓝图，不需要敲代码。哈哈哈。

资源准备

  1. 第一部分场景资源，然后编译。
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    Begin Object Class=/Script/UnrealEd.MaterialGraphNode_Root Name="MaterialGraphNode_Root_0"
       Material=PreviewMaterial'/Engine/Transient.Decal_Master'
       NodePosX=1680
       NodePosY=208
       NodeGuid=128B5F884331F304661266899AB74A45
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    End Object

添加主场景街道

  1. 添加街道，并添加多一点细分曲面。然后查看贴图和纹理信息，无误。

  2. 依次添加中间的路道，井盖，并添加路面破损纹理，最后记得用画笔添加街道上的杂物。

制作一个用来部署小草的笔刷

  1. 转到Quixel MegaScans软件里面下载一个草的资源。

  2. 转到Maya里面自定义一下草丛的外形，注意要向外扩张，草组要用来修饰街道路间的缝隙。

下载小草的模型

  1. 在Quixel MegaScans找到一个漂亮的模型，然后下载下来，可以参考我用的资源模型代号。

  2. 将草设置为预制体后，编辑材质，添加节点，设置贴图、纹理、照明、放射等。将下载的资源连接到对应的位置即可。如图：

街道上的小石子

  1. 在Quixel MegaScans下载小石子的3D模型，同以上布置到街道即可。注意节点那里用置换不要用凹凸。

使街道看上去陈旧和碎片化

  1. 在Quixel Studio 生成新的纹理，注意色彩饱和度，颜色转换的调节，这里我随便挑的暖色偏黄，可根据自己的喜好调。应用到街道的人行道和那个白色的指示线，最后环境遮挡和环境光设置一下。


Wetness 粒子预设

  1. 添加wetness effect，开启光影渲染。

    程序化脚本

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         ParameterName="Albedo"
         ExpressionGUID=6833A7F94E83B79CEAFDACAA7E9A0079
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         MaterialExpressionGuid=2A016ADC4165BFDFC0A83E8EFE8771EF
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      CustomProperties Pin (PinId=A5D317EA4E3753A580B128BFAA4E8995,PinName="Output",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_27 400FEC954BE67054C31952A1F147F9BC,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
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      CustomProperties Pin (PinId=B51DC8C74258181E370B1FB5FDF0DAA2,PinName="Output4",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="blue",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,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=39EE8A184F50D14E20252F99AA011DF5,PinName="Output5",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="alpha",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
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    Begin Object Class=/Script/UnrealEd.MaterialGraphNode Name="MaterialGraphNode_11"
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      Begin Object Name="MaterialExpressionOneMinus_0"
         Input=(Expression=MaterialExpressionTextureSampleParameter2D'MaterialGraphNode_12.MaterialExpressionTextureSampleParameter2D_1',OutputIndex=1,Mask=1,MaskR=1)
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         MaterialExpressionGuid=A7FBB69A4289B23E710FE7B872C4A058
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      NodePosX=-400
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      CustomProperties Pin (PinId=68C837254D2623C6A463B9B18C1666C5,PinName="Output",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_8 CBFB4D1948861C28F0CC61B55A4B89D8,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
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    Begin Object Class=/Script/UnrealEd.MaterialGraphNode Name="MaterialGraphNode_12"
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      Begin Object Name="MaterialExpressionTextureSampleParameter2D_1"
         ParameterName="Gloss"
         ExpressionGUID=7111DCD842C5EAA0307C38856D6C7057
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      NodePosX=-560
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      CustomProperties Pin (PinId=1C361770462DE2B1428F8784C0ADAB69,PinName="Output",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
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      CustomProperties Pin (PinId=3AEA8D9A4DF8A93C3D14A8943CE4427F,PinName="Output3",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="green",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
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      CustomProperties Pin (PinId=DD37B5D646E0C3D5786CF4AB725AA1FA,PinName="Output5",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="mask",PinType.PinSubCategory="alpha",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
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    Begin Object Class=/Script/UnrealEd.MaterialGraphNode Name="MaterialGraphNode_13"
      Begin Object Class=/Script/Engine.MaterialExpressionMaterialFunctionCall Name="MaterialExpressionMaterialFunctionCall_0"
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      Begin Object Name="MaterialExpressionMaterialFunctionCall_0"
         MaterialFunction=MaterialFunction'/Engine/Functions/Engine_MaterialFunctions01/Texturing/ParallaxOcclusionMapping.ParallaxOcclusionMapping'
         FunctionInputs(0)=(ExpressionInputId=D3CD700647D7EF6A57FF4EB239783FD9,Input=(Expression=MaterialExpressionTextureObjectParameter'MaterialGraphNode_14.MaterialExpressionTextureObjectParameter_0',InputName="Heightmap Texture"))
         FunctionInputs(1)=(ExpressionInputId=87508BD245D6CCD2972534BB5478DF07,Input=(Expression=MaterialExpressionScalarParameter'MaterialGraphNode_16.MaterialExpressionScalarParameter_0',InputName="Height Ratio"))
         FunctionInputs(2)=(ExpressionInputId=C6EB5A304CEDCCB94B51698214927D75,Input=(Expression=MaterialExpressionScalarParameter'MaterialGraphNode_17.MaterialExpressionScalarParameter_1',InputName="Min Steps"))
         FunctionInputs(3)=(ExpressionInputId=38DC91194340C3172D478F8134871AAC,Input=(Expression=MaterialExpressionScalarParameter'MaterialGraphNode_18.MaterialExpressionScalarParameter_2',InputName="Max Steps"))
         FunctionInputs(4)=(ExpressionInputId=5DD7ACAE4E3F667915F3AFB368F146B7,Input=(Expression=MaterialExpressionMultiply'MaterialGraphNode_43.MaterialExpressionMultiply_4',InputName="UVs"))
         FunctionInputs(5)=(ExpressionInputId=9AC5B0694B7F9A6A4A7A4EB4AC2E4AD8,Input=(Expression=MaterialExpressionAppendVector'MaterialGraphNode_40.MaterialExpressionAppendVector_0',InputName="Heightmap Channel"))
         FunctionInputs(6)=(ExpressionInputId=F8D34C5E4F5BD1CE31CBE78F4FA30D00,Input=(Expression=MaterialExpressionScalarParameter'MaterialGraphNode_38.MaterialExpressionScalarParameter_6',InputName="Reference Plane"))
         FunctionInputs(7)=(ExpressionInputId=ED8CD290413B44C28DA13AB9277D307B,Input=(OutputIndex=-1,InputName="-----------------------------"))
         FunctionInputs(8)=(ExpressionInputId=0E56245349503209844EEF91A46BA555,Input=(OutputIndex=-1,InputName="Use World Coordinates"))
         FunctionInputs(9)=(ExpressionInputId=FD746ECC45EE787213C5DEA274BD2906,Input=(OutputIndex=-1,InputName="Specify Manual Texture Size"))
         FunctionInputs(10)=(ExpressionInputId=E33AB7C14CCCC01624FE409E7479A4A5,Input=(OutputIndex=-1,InputName="Manual Texture Size"))
         FunctionInputs(11)=(ExpressionInputId=3AFFFA8E44372B48C9EEDCA807C10DB9,Input=(OutputIndex=-1,InputName="------------------------------"))
         FunctionInputs(12)=(ExpressionInputId=742B79554E19CE37969C35B9BF7A13E5,Input=(OutputIndex=-1,InputName="Render Shadows (Occlusion Mapping)"))
         FunctionInputs(13)=(ExpressionInputId=B312F88640D8CD07BA718987D2F68798,Input=(Expression=MaterialExpressionLightVector'MaterialGraphNode_15.MaterialExpressionLightVector_0',InputName="Light Vector"))
         FunctionInputs(14)=(ExpressionInputId=3FE0DA4A4B2DE19C9C9672AD9653A18F,Input=(Expression=MaterialExpressionScalarParameter'MaterialGraphNode_19.MaterialExpressionScalarParameter_3',InputName="Shadow Steps"))
         FunctionInputs(15)=(ExpressionInputId=0DD23D2047334724A697448DB16DAA07,Input=(Expression=MaterialExpressionScalarParameter'MaterialGraphNode_20.MaterialExpressionScalarParameter_4',InputName="Shadow Penumbra"))
         FunctionOutputs(0)=(ExpressionOutputId=4ADDA7A84E423550062B76AE7C6E11CB,Output=(OutputName="Parallax UVs"))
         FunctionOutputs(1)=(ExpressionOutputId=8258927B4F3A106ACC7FAA9AC9C32CAE,Output=(OutputName="Offset Only"))
         FunctionOutputs(2)=(ExpressionOutputId=0D45CD6D49F3025A6699408D7CB08A5F,Output=(OutputName="Shadow"))
         FunctionOutputs(3)=(ExpressionOutputId=E3AD423344E244638874F9AF6D79749D,Output=(OutputName="Pixel Depth Offset"))
         FunctionOutputs(4)=(ExpressionOutputId=994E0D0A4904AABAE4E7AFAA8A55B61F,Output=(OutputName="World Position"))
         FunctionOutputs(5)=(ExpressionOutputId=0422E21C46F047C08010108CE9080F67,Output=(OutputName="Tangent Light Vector"))
         FunctionOutputs(6)=(ExpressionOutputId=94349DAC4478EF16DDD1109EC23B0DED,Output=(OutputName="Material Complexity - Steps Debug"))
         MaterialExpressionEditorX=-2080
         MaterialExpressionEditorY=-272
         MaterialExpressionGuid=DE39E26844C140069064DB9982E627A0
         Material=PreviewMaterial'/Engine/Transient.Decal_Master'
         Outputs(0)=(OutputName="Parallax UVs")
         Outputs(1)=(OutputName="Offset Only")
         Outputs(2)=(OutputName="Shadow")
         Outputs(3)=(OutputName="Pixel Depth Offset")
         Outputs(4)=(OutputName="World Position")
         Outputs(5)=(OutputName="Tangent Light Vector")
         Outputs(6)=(OutputName="Material Complexity - Steps Debug")
      End Object
      MaterialExpression=MaterialExpressionMaterialFunctionCall'MaterialExpressionMaterialFunctionCall_0'
      NodePosX=-2080
      NodePosY=-272
      NodeGuid=AECD486E4D7141CE372CF6BC72AB637B
      CustomProperties Pin (PinId=2F8B5FA7460E99E46FB9D6A66CA76149,PinName="Heightmap Texture (T2d)",PinType.PinCategory="required",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_14 45AE87804D19CEE1714F3E8E87899CF2,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
      CustomProperties Pin (PinId=E676878349EF9EECF1CE858FC7584AB9,PinName="Height Ratio (S)",PinType.PinCategory="optional",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_16 447FD43E4FB3BD1FC6E79CBFAF5A2F0C,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
      CustomProperties Pin (PinId=849DC3D24DB5015C89181F864C266B41,PinName="Min Steps (S)",PinType.PinCategory="optional",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_17 19B892FB44B8548CABBEBE90DC263CBD,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
      CustomProperties Pin (PinId=0CBA60BB440A7871E53919A2FD9CAC1B,PinName="Max Steps (S)",PinType.PinCategory="optional",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_18 58956FE142A03202E483F4AE8EEBF662,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
      CustomProperties Pin (PinId=1DA5339F44B8DFB7545C82BA76E77BB0,PinName="UVs (V2)",PinType.PinCategory="optional",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_43 58D8DF54472C1AB2FFB49D9D2F81B1FF,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
      CustomProperties Pin (PinId=2E012DF54A5EB31F05B0428C86F0D791,PinName="Heightmap Channel (V4)",PinType.PinCategory="optional",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_40 4960BB814DEE2D8C3AFE59A3A7474800,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
      CustomProperties Pin (PinId=AD4C626446223D42FC9F30AB79DB55D7,PinName="Reference Plane (S)",PinType.PinCategory="optional",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_38 7DC7E71049453FF276A36EB995961999,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
      CustomProperties Pin (PinId=B9988F094DF883CC4A0BB08CB88327F6,PinName="----------------------------- (B)",PinType.PinCategory="optional",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,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=90240B2148CCE91960FA268839EC0DA0,PinName="Use World Coordinates (B)",PinType.PinCategory="optional",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,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=62C6731744A359822012C39072C81F0C,PinName="Specify Manual Texture Size (B)",PinType.PinCategory="optional",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,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=4FAC7F5E46A52CB992221E9FBD2C58E5,PinName="Manual Texture Size (S)",PinType.PinCategory="optional",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,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=A25C69DF4300BDD331BB9D9A52B4BD50,PinName="------------------------------ (B)",PinType.PinCategory="optional",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,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=C70FC46149047428743CAC8202957F0E,PinName="Render Shadows (Occlusion Mapping) (B)",PinType.PinCategory="optional",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,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=AEAA0381494DA17512283BA170B3C7D4,PinName="Light Vector (V3)",PinType.PinCategory="optional",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_15 F4A14B924EA145C9FAF67898C5AED8CB,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
      CustomProperties Pin (PinId=EF76146A4C36411FD45C7F864F93524E,PinName="Shadow Steps (S)",PinType.PinCategory="optional",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_19 1B2C3AE444C6F1F6A552B9AC752C49C1,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
      CustomProperties Pin (PinId=FAD84F6D4EBC43744C979495D49D8B09,PinName="Shadow Penumbra (S)",PinType.PinCategory="optional",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_20 F59FFF884F4EB6ECA8AF14B5BFD08C02,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
      CustomProperties Pin (PinId=06F116CC4E1F64FBC69F3DB5C11CAE9C,PinName="Parallax UVs",Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_24 FF756D1C4DC0CC20A8888D8F1433C2A0,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
      CustomProperties Pin (PinId=57B4FB8F47CB239B4465EEB58A05A549,PinName="Offset Only",Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,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=4F263913444A5CE2783CCE88C6ED9A61,PinName="Shadow",Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,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=A8313AE941847054046AA098ED8469ED,PinName="Pixel Depth Offset",Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,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=F69E602044E2FD81C648F98F0B6D81E0,PinName="World Position",Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,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=6B91999E4D332AE786D08F94A385BB68,PinName="Tangent Light Vector",Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,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=8FB16B294558040C0AB231910721C474,PinName="Material Complexity - Steps Debug",Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,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=/Script/UnrealEd.MaterialGraphNode Name="MaterialGraphNode_14"
      Begin Object Class=/Script/Engine.MaterialExpressionTextureObjectParameter Name="MaterialExpressionTextureObjectParameter_0"
      End Object
      Begin Object Name="MaterialExpressionTextureObjectParameter_0"
         ParameterName="Height"
         ExpressionGUID=84A20DE14F4C0E2D7D35689A3183954F
         Texture=Texture2D'/Game/Textures/Decals/Manhole_Small_1/Displacement.Displacement'
         MaterialExpressionEditorX=-2319
         MaterialExpressionEditorY=-545
         MaterialExpressionGuid=D9B7CC064C228C7398893EBC95640F12
         Material=PreviewMaterial'/Engine/Transient.Decal_Master'
      End Object
      MaterialExpression=MaterialExpressionTextureObjectParameter'MaterialExpressionTextureObjectParameter_0'
      NodePosX=-2319
      NodePosY=-545
      bCanRenameNode=True
      NodeGuid=32A2749742790C126DC38282B5EA94DA
      CustomProperties Pin (PinId=45AE87804D19CEE1714F3E8E87899CF2,PinName="Output",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_13 2F8B5FA7460E99E46FB9D6A66CA76149,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
    End Object
    Begin Object Class=/Script/UnrealEd.MaterialGraphNode Name="MaterialGraphNode_15"
      Begin Object Class=/Script/Engine.MaterialExpressionLightVector Name="MaterialExpressionLightVector_0"
      End Object
      Begin Object Name="MaterialExpressionLightVector_0"
         MaterialExpressionEditorX=-2560
         MaterialExpressionEditorY=304
         MaterialExpressionGuid=04855A70403907BF0BAB049F560E217D
         Material=PreviewMaterial'/Engine/Transient.Decal_Master'
      End Object
      MaterialExpression=MaterialExpressionLightVector'MaterialExpressionLightVector_0'
      NodePosX=-2560
      NodePosY=304
      NodeGuid=7E98A53A400805C6E1E9B98A61E9CF9A
      CustomProperties Pin (PinId=F4A14B924EA145C9FAF67898C5AED8CB,PinName="Output",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_13 AEAA0381494DA17512283BA170B3C7D4,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
    End Object
    Begin Object Class=/Script/UnrealEd.MaterialGraphNode Name="MaterialGraphNode_16"
      Begin Object Class=/Script/Engine.MaterialExpressionScalarParameter Name="MaterialExpressionScalarParameter_0"
      End Object
      Begin Object Name="MaterialExpressionScalarParameter_0"
         DefaultValue=0.040000
         ParameterName="POM_HeightRatio"
         ExpressionGUID=C0CD8E8148AF9E2BFD9C42A7B29A293E
         MaterialExpressionEditorX=-2608
         MaterialExpressionEditorY=-496
         MaterialExpressionGuid=0931A0BE4A005BC32F77C8AB2B3B2E93
         Material=PreviewMaterial'/Engine/Transient.Decal_Master'
      End Object
      MaterialExpression=MaterialExpressionScalarParameter'MaterialExpressionScalarParameter_0'
      NodePosX=-2608
      NodePosY=-496
      bCanRenameNode=True
      NodeGuid=E61116FB4B8BE08990B85A9628613E2F
      CustomProperties Pin (PinId=447FD43E4FB3BD1FC6E79CBFAF5A2F0C,PinName="Output",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_13 E676878349EF9EECF1CE858FC7584AB9,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
    End Object
    Begin Object Class=/Script/UnrealEd.MaterialGraphNode Name="MaterialGraphNode_17"
      Begin Object Class=/Script/Engine.MaterialExpressionScalarParameter Name="MaterialExpressionScalarParameter_1"
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      Begin Object Name="MaterialExpressionScalarParameter_1"
         DefaultValue=2.000000
         ParameterName="POM_MinSteps"
         ExpressionGUID=66AB59034AF1D32AB27796AC1A5AC75B
         MaterialExpressionEditorX=-2624
         MaterialExpressionEditorY=-400
         MaterialExpressionGuid=DA2096B04679E309304CF4BAA28F50DF
         Material=PreviewMaterial'/Engine/Transient.Decal_Master'
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      MaterialExpression=MaterialExpressionScalarParameter'MaterialExpressionScalarParameter_1'
      NodePosX=-2624
      NodePosY=-400
      bCanRenameNode=True
      NodeGuid=78BCDA444EF0CCEAA91FE892F3B8C231
      CustomProperties Pin (PinId=19B892FB44B8548CABBEBE90DC263CBD,PinName="Output",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_13 849DC3D24DB5015C89181F864C266B41,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
    End Object
    Begin Object Class=/Script/UnrealEd.MaterialGraphNode Name="MaterialGraphNode_18"
      Begin Object Class=/Script/Engine.MaterialExpressionScalarParameter Name="MaterialExpressionScalarParameter_2"
      End Object
      Begin Object Name="MaterialExpressionScalarParameter_2"
         DefaultValue=128.000000
         ParameterName="POM_MaxSteps"
         ExpressionGUID=01AF43AC407D20A4DEB5F9A00C0DD2A0
         MaterialExpressionEditorX=-2624
         MaterialExpressionEditorY=-320
         MaterialExpressionGuid=DA2096B04679E309304CF4BAA28F50DF
         Material=PreviewMaterial'/Engine/Transient.Decal_Master'
      End Object
      MaterialExpression=MaterialExpressionScalarParameter'MaterialExpressionScalarParameter_2'
      NodePosX=-2624
      NodePosY=-320
      bCanRenameNode=True
      NodeGuid=C2E83452457DAD2BC453DF96633AD4B5
      CustomProperties Pin (PinId=58956FE142A03202E483F4AE8EEBF662,PinName="Output",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_13 0CBA60BB440A7871E53919A2FD9CAC1B,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
    End Object
    Begin Object Class=/Script/UnrealEd.MaterialGraphNode Name="MaterialGraphNode_19"
      Begin Object Class=/Script/Engine.MaterialExpressionScalarParameter Name="MaterialExpressionScalarParameter_3"
      End Object
      Begin Object Name="MaterialExpressionScalarParameter_3"
         DefaultValue=16.000000
         ParameterName="POM_ShadowSteps"
         ExpressionGUID=D962987F4E396EDB8EDA1FB913C07851
         MaterialExpressionEditorX=-2561
         MaterialExpressionEditorY=387
         MaterialExpressionGuid=E89357EB4F2C0D24D5C89B8A247AA3A0
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      CustomProperties Pin (PinId=3CEA27064EFED429787E719E0EDCE23D,PinName="Output",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_29 00D3117F466B0124F7A2D1B30EDB5502,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
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    Begin Object Class=/Script/UnrealEd.MaterialGraphNode Name="MaterialGraphNode_35"
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      Begin Object Name="MaterialExpressionStaticSwitchParameter_1"
         A=(Expression=MaterialExpressionOneMinus'MaterialGraphNode_36.MaterialExpressionOneMinus_1')
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      CustomProperties Pin (PinId=D93F2F73439E05CE310D55BF4B5953BD,PinName="Output",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_33 6128D5534CD366F4C0E1F4A1527B83D8,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
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      CustomProperties Pin (PinId=AD0732D9484107B3C19619A32B867A2F,PinName="Output",PinFriendlyName=" ",Direction="EGPD_Output",PinType.PinCategory="",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(MaterialGraphNode_35 EFF20D4649F5FB5D26043187AB3DFF52,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,)
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         ParameterName="ReferencePlane"
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到这里，一个可以用的3D游戏场景就做好了，细节太多了很多地方都省了，建议系统学一下Epic，Adobe，Autedesk，Quixel系列软件，奥里给。

虚幻四 场景搭建
虚幻四 场景搭建

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