[Unreal Engine 4] Improving Screen Space Reflections

If you ever felt the need to adjust or improve the built-in screen space reflections of UE4 take a look at the ScreenSpaceReflections.usf shader file.
It's located in this directory: \Unreal Engine\4.x\Engine\Shaders\

In the SSR shader file search for this part of the code. The line number varies a bit with each engine version, but it should be somewhere around 340-350.

#if SSR_QUALITY == 1
const int NumSteps = 8;
const int NumRays = 1;
#elif SSR_QUALITY == 2
const int NumSteps = 16;
const int NumRays = 1;
#elif SSR_QUALITY == 3
const int NumSteps = 8;
const int NumRays = 4;
#else // SSR_QUALITY == 4
const int NumSteps = 12;
const int NumRays = 12;
#endif

There are 3 quality levels with 2 parameters which define the quality of reflections.

NumSteps - Number of steps. This defines the accuracy of reflections and causes a reasonable performance impact.
For any value above 32 you will hardly notice a difference
NumRays - Number of rays. Using more rays takes away the noise of reflections but is rather expensive.

The default settings are a bit strange since the number of steps drops from 16 back to 8 at quality level 3. My recommendation would be to set NumSteps to 16 for high quality. This comes at a little performance impact. You might also lower NumRays by 1 at the same time to gain back the lost FPS.

Here's a set of screenshots to demonstrate various value combinations as well as their impact on performance.

NumSteps=8 / NumRays=1

NumSteps=16 / NumRays=1

NumSteps=16 / NumRays=2

NumSteps=8 / NumRays=4

NumSteps=16 / NumRays=4

NumSteps=16 / NumRays=8

NumSteps=32 / NumRays=4

NumSteps=32 / NumRays=8

NumSteps=32 / NumRays=32

[UE3/UE4] Ocean Waves Normals

Using the world position offset (aka vertex shader) is a popular way of creating large scale ocean waves in unreal engine 3/4. The drawback is that any kind of deformed geometry won't affect the shading at all. That's why you need to manually calculate the new normals inside the material.
To do so it is necessary to calculate the derivatives of the same function which is used to form the ocean waves. The derivatives with respect to x and y are equivalent to the red and green channel of a normal map. Given these 2 components it is possible to calculate the missing 3rd component to get the final per pixel normals.
I'm well aware that there are many ways of implementing ocean motion but I decided to only cover one approach with 2 sub-types, directional waves and circular waves.
In a realistic ocean material you would usually combine multiple waves of different size, speed, direction/position, which also means you would need to duplicate the material graphs shown in this tutorial. Personally I wouldn't calculate the normal for more than 3-4 waves to keep the overall material complexity at a moedrate level.

The material setups below will only work properly if  "Tangent Space Normal" is unchecked in the material properties. This is due to the fact that all calculations are done in world space which also means the generated normals are in world space. If you like to combine these normals with a normal map you would need to do transformation from world to tangent space first.


Directional Waves

Directional waves are based on the dot product between the world position of each pixel and a world space direction vector. This dot product gets added to the time and then fed into a sine node to move the vertices along the z-axis.

Generating normals for directional waves is rather easy. The sine node is being replaced by cosine and then multiplied by the direction vectors' x- and y-component.
In the example below you can also see that the normal intensity is automatically calculated by comparing the length and height of a wave.

Circular Waves

Circular waves are defined by an origin point and the distance between this origin and the world position. Similar to the directional wave setup this distance is added to time and then fed into a sine node.

The material setup for calculating the derivatives for circular waves is a bit more complex, because the distance node involves a square root.

[Unreal Engine 4] Custom Ambient Cubemap Post Process

When posting a quick tip about this topic several weeks ago, I wasn't very specific about how to setup the material at all... so here's the missing addendum.

When comparing the screenshots below you can clearly tell that my simplified version is not physically accurate, as it's missing a fesnel effect which would strengthen reflections at extreme angles. In addition it doesn't take MaterialAO and Specularity into account.
You can however add these missing features if you need them. For further reference you might want to take a look at the PostProcessAmbient.usf shader file to see how epic did it.


Material

Direct Light Only

Built-in Ambient Cubemap PP

Custom Ambient Cubemap PP

[Unreal Engine 4] Automated Terrain Texturing

In this post I'm going through some material setups to auto-texture a landscape. This can be very handy for landscapes sculpted inside the editor or for any kind of prototyping. Personally I've been using this technique for quickly testing many different landscapes coming from an external terrain generation software.


For the automated texturing I'm using 2 common methods: blending textures based on slope and blending based on height.


Slope Blending

Slope blending is based on the blue channel of the world space normals.
For the material setup below keep in mind that the 'Angle' parameter has a range of 0-1 which translates to 0°-90°.
0.25 as in this example means Texture B would show up for areas where the slope of the terrain is 77,5° (=1-0.25)*90) or more, Texture A would be mapped to areas with a slope ranging from 0° to 77,5°.

Height Blending

Height blending is based on the blue channel of the absolute world position. The 'Height' and 'HeightFalloff' parameters are world space values.

Combining Both Methods

For some more advanced texture blending you might want to combine both approaches.

1.) In this example I want to blend grass and rocks based on slope. However I don't want the grass to show up on top of the mountains, so I'm using an additional height blend as well.

2.) Another example would be some snow on top of the mountains. Using only a height blend would look pretty unnatural, that's why I'm adding a slope blend which gives a more realistic look.
 

Example

My basic material is blending between 2 types of grass (height blending) and 2 types of rock (slope blending).

For the advanced material I've added an additional height blend for some sand when there is supposed to be a lake or ocean and a snow blend (height+slope combined):

Download

Well, no download here... all you need to do is copy and paste the code below to your material to get the same nodes as in the advanced example:

Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_200"
   Begin Object Class=EdGraphPin Name="EdGraphPin_3617"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3616"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3615"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3614"
   End Object
   Begin Object Class=MaterialExpressionLinearInterpolate Name="MaterialExpressionLinearInterpolate_21"
   End Object
   Begin Object Name="EdGraphPin_3617"
      PinName="Output"
      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_Root_2.EdGraphPin_3591"'
   End Object
   Begin Object Name="EdGraphPin_3616"
      PinName="Alpha"
      PinType=(PinCategory="optional")
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_282.EdGraphPin_3810"'
   End Object
   Begin Object Name="EdGraphPin_3615"
      PinName="B"
      PinType=(PinCategory="optional")
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_251.EdGraphPin_3735"'
   End Object
   Begin Object Name="EdGraphPin_3614"
      PinName="A"
      PinType=(PinCategory="optional")
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_201.EdGraphPin_3621"'
   End Object
   Begin Object Name="MaterialExpressionLinearInterpolate_21"
      A=(Expression=MaterialExpressionLinearInterpolate'"MaterialGraphNode_201.MaterialExpressionLinearInterpolate_22"')
      B=(Expression=MaterialExpressionConstant3Vector'"MaterialGraphNode_251.MaterialExpressionConstant3Vector_26"')
      Alpha=(Expression=MaterialExpressionPower'"MaterialGraphNode_282.MaterialExpressionPower_14"')
      MaterialExpressionEditorX=-176
      Material=PreviewMaterial'/Engine/Transient.PreviewMaterial_2'
   End Object
   MaterialExpression=MaterialExpressionLinearInterpolate'MaterialExpressionLinearInterpolate_21'
   Pins(0)=EdGraphPin'EdGraphPin_3614'
   Pins(1)=EdGraphPin'EdGraphPin_3615'
   Pins(2)=EdGraphPin'EdGraphPin_3616'
   Pins(3)=EdGraphPin'EdGraphPin_3617'
   NodePosX=-176
   NodeGuid=685B85D844CE0652C97A3C99BF97174B
End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_201"
   Begin Object Class=EdGraphPin Name="EdGraphPin_3621"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3620"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3619"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3618"
   End Object
   Begin Object Class=MaterialExpressionLinearInterpolate Name="MaterialExpressionLinearInterpolate_22"
   End Object
   Begin Object Name="EdGraphPin_3621"
      PinName="Output"
      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_200.EdGraphPin_3614"'
   End Object
   Begin Object Name="EdGraphPin_3620"
      PinName="Alpha"
      PinType=(PinCategory="optional")
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_225.EdGraphPin_3676"'
   End Object
   Begin Object Name="EdGraphPin_3619"
      PinName="B"
      PinType=(PinCategory="optional")
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_222.EdGraphPin_3669"'
   End Object
   Begin Object Name="EdGraphPin_3618"
      PinName="A"
      PinType=(PinCategory="optional")
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_202.EdGraphPin_3625"'
   End Object
   Begin Object Name="MaterialExpressionLinearInterpolate_22"
      A=(Expression=MaterialExpressionLinearInterpolate'"MaterialGraphNode_202.MaterialExpressionLinearInterpolate_23"')
      B=(Expression=MaterialExpressionConstant3Vector'"MaterialGraphNode_222.MaterialExpressionConstant3Vector_23"')
      Alpha=(Expression=MaterialExpressionPower'"MaterialGraphNode_225.MaterialExpressionPower_13"')
      MaterialExpressionEditorX=-368
      MaterialExpressionEditorY=-192
      Material=PreviewMaterial'/Engine/Transient.PreviewMaterial_2'
   End Object
   MaterialExpression=MaterialExpressionLinearInterpolate'MaterialExpressionLinearInterpolate_22'
   Pins(0)=EdGraphPin'EdGraphPin_3618'
   Pins(1)=EdGraphPin'EdGraphPin_3619'
   Pins(2)=EdGraphPin'EdGraphPin_3620'
   Pins(3)=EdGraphPin'EdGraphPin_3621'
   NodePosX=-368
   NodePosY=-192
   NodeGuid=C9D116674874B161A0AAD398E16B88A2
End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_202"
   Begin Object Class=EdGraphPin Name="EdGraphPin_3625"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3624"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3623"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3622"
   End Object
   Begin Object Class=MaterialExpressionLinearInterpolate Name="MaterialExpressionLinearInterpolate_23"
   End Object
   Begin Object Name="EdGraphPin_3625"
      PinName="Output"
      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_201.EdGraphPin_3618"'
   End Object
   Begin Object Name="EdGraphPin_3624"
      PinName="Alpha"
      PinType=(PinCategory="optional")
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_249.EdGraphPin_3733"'
   End Object
   Begin Object Name="EdGraphPin_3623"
      PinName="B"
      PinType=(PinCategory="optional")
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_223.EdGraphPin_3670"'
   End Object
   Begin Object Name="EdGraphPin_3622"
      PinName="A"
      PinType=(PinCategory="optional")
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_248.EdGraphPin_3730"'
   End Object
   Begin Object Name="MaterialExpressionLinearInterpolate_23"
      A=(Expression=MaterialExpressionLinearInterpolate'"MaterialGraphNode_248.MaterialExpressionLinearInterpolate_24"')
      B=(Expression=MaterialExpressionConstant3Vector'"MaterialGraphNode_223.MaterialExpressionConstant3Vector_24"')
      Alpha=(Expression=MaterialExpressionMaterialFunctionCall'"MaterialGraphNode_249.MaterialExpressionMaterialFunctionCall_5"')
      ConstB=0.500000
      MaterialExpressionEditorX=-544
      MaterialExpressionEditorY=-400
      Material=PreviewMaterial'/Engine/Transient.PreviewMaterial_2'
   End Object
   MaterialExpression=MaterialExpressionLinearInterpolate'MaterialExpressionLinearInterpolate_23'
   Pins(0)=EdGraphPin'EdGraphPin_3622'
   Pins(1)=EdGraphPin'EdGraphPin_3623'
   Pins(2)=EdGraphPin'EdGraphPin_3624'
   Pins(3)=EdGraphPin'EdGraphPin_3625'
   NodePosX=-544
   NodePosY=-400
   NodeGuid=590CB4DE4B6E2BEBEB68BA9F73082B62
End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_203"
   Begin Object Class=EdGraphPin Name="EdGraphPin_3626"
   End Object
   Begin Object Class=MaterialExpressionVertexNormalWS Name="MaterialExpressionVertexNormalWS_14"
   End Object
   Begin Object Name="EdGraphPin_3626"
      PinName="Output"
      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_204.EdGraphPin_3627"'
   End Object
   Begin Object Name="MaterialExpressionVertexNormalWS_14"
      MaterialExpressionEditorX=-1760
      MaterialExpressionEditorY=-416
      Material=PreviewMaterial'/Engine/Transient.PreviewMaterial_2'
   End Object
   MaterialExpression=MaterialExpressionVertexNormalWS'MaterialExpressionVertexNormalWS_14'
   Pins(0)=EdGraphPin'EdGraphPin_3626'
   NodePosX=-1760
   NodePosY=-416
   NodeGuid=DD13FC2B4A737B625FDB48ABFB56A05B
End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_204"
   Begin Object Class=EdGraphPin Name="EdGraphPin_3628"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3627"
   End Object
   Begin Object Class=MaterialExpressionComponentMask Name="MaterialExpressionComponentMask_30"
   End Object
   Begin Object Name="EdGraphPin_3628"
      PinName="Output"
      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_205.EdGraphPin_3629"'
   End Object
   Begin Object Name="EdGraphPin_3627"
      PinName="Input"
      PinFriendlyName=" "
      PinType=(PinCategory="required")
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_203.EdGraphPin_3626"'
   End Object
   Begin Object Name="MaterialExpressionComponentMask_30"
      Input=(Expression=MaterialExpressionVertexNormalWS'"MaterialGraphNode_203.MaterialExpressionVertexNormalWS_14"')
      B=True
      MaterialExpressionEditorX=-1584
      MaterialExpressionEditorY=-416
      Material=PreviewMaterial'/Engine/Transient.PreviewMaterial_2'
   End Object
   MaterialExpression=MaterialExpressionComponentMask'MaterialExpressionComponentMask_30'
   Pins(0)=EdGraphPin'EdGraphPin_3627'
   Pins(1)=EdGraphPin'EdGraphPin_3628'
   NodePosX=-1584
   NodePosY=-416
   NodeGuid=46238FCF49A64AE15B0FB199C65598A4
End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_205"
   Begin Object Class=EdGraphPin Name="EdGraphPin_3631"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3630"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3629"
   End Object
   Begin Object Class=MaterialExpressionSubtract Name="MaterialExpressionSubtract_39"
   End Object
   Begin Object Name="EdGraphPin_3631"
      PinName="Output"
      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_208.EdGraphPin_3638"'
   End Object
   Begin Object Name="EdGraphPin_3630"
      PinName="B"
      PinType=(PinCategory="optional")
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_210.EdGraphPin_3644"'
   End Object
   Begin Object Name="EdGraphPin_3629"
      PinName="A"
      PinType=(PinCategory="optional")
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_204.EdGraphPin_3628"'
   End Object
   Begin Object Name="MaterialExpressionSubtract_39"
      A=(Expression=MaterialExpressionComponentMask'"MaterialGraphNode_204.MaterialExpressionComponentMask_30"')
      B=(Expression=MaterialExpressionScalarParameter'"MaterialGraphNode_210.MaterialExpressionScalarParameter_50"')
      ConstB=0.500000
      MaterialExpressionEditorX=-1472
      MaterialExpressionEditorY=-416
      Material=PreviewMaterial'/Engine/Transient.PreviewMaterial_2'
   End Object
   MaterialExpression=MaterialExpressionSubtract'MaterialExpressionSubtract_39'
   Pins(0)=EdGraphPin'EdGraphPin_3629'
   Pins(1)=EdGraphPin'EdGraphPin_3630'
   Pins(2)=EdGraphPin'EdGraphPin_3631'
   NodePosX=-1472
   NodePosY=-416
   NodeGuid=FACC47FE4059E4B4B8AAB98E3B5EE43E
End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_206"
   Begin Object Class=EdGraphPin Name="EdGraphPin_3634"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3633"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3632"
   End Object
   Begin Object Class=MaterialExpressionMultiply Name="MaterialExpressionMultiply_31"
   End Object
   Begin Object Name="EdGraphPin_3634"
      PinName="Output"
      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_219.EdGraphPin_3664"'
   End Object
   Begin Object Name="EdGraphPin_3633"
      PinName="B"
      PinType=(PinCategory="optional")
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_207.EdGraphPin_3637"'
   End Object
   Begin Object Name="EdGraphPin_3632"
      PinName="A"
      PinType=(PinCategory="optional")
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_208.EdGraphPin_3641"'
   End Object
   Begin Object Name="MaterialExpressionMultiply_31"
      A=(Expression=MaterialExpressionClamp'"MaterialGraphNode_208.MaterialExpressionClamp_31"')
      B=(Expression=MaterialExpressionDivide'"MaterialGraphNode_207.MaterialExpressionDivide_39"')
      ConstB=2.000000
      MaterialExpressionEditorX=-1168
      MaterialExpressionEditorY=-416
      Material=PreviewMaterial'/Engine/Transient.PreviewMaterial_2'
   End Object
   MaterialExpression=MaterialExpressionMultiply'MaterialExpressionMultiply_31'
   Pins(0)=EdGraphPin'EdGraphPin_3632'
   Pins(1)=EdGraphPin'EdGraphPin_3633'
   Pins(2)=EdGraphPin'EdGraphPin_3634'
   NodePosX=-1168
   NodePosY=-416
   NodeGuid=5B32F5014DBAEEA0E69C27B3C051A0BF
End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_207"
   Begin Object Class=EdGraphPin Name="EdGraphPin_3637"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3636"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3635"
   End Object
   Begin Object Class=MaterialExpressionDivide Name="MaterialExpressionDivide_39"
   End Object
   Begin Object Name="EdGraphPin_3637"
      PinName="Output"
      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_206.EdGraphPin_3633"'
   End Object
   Begin Object Name="EdGraphPin_3636"
      PinName="B"
      PinType=(PinCategory="optional")
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_209.EdGraphPin_3643"'
   End Object
   Begin Object Name="EdGraphPin_3635"
      PinName="A"
      PinType=(PinCategory="optional")
   End Object
   Begin Object Name="MaterialExpressionDivide_39"
      B=(Expression=MaterialExpressionOneMinus'"MaterialGraphNode_209.MaterialExpressionOneMinus_21"')
      MaterialExpressionEditorX=-1472
      MaterialExpressionEditorY=-320
      Material=PreviewMaterial'/Engine/Transient.PreviewMaterial_2'
   End Object
   MaterialExpression=MaterialExpressionDivide'MaterialExpressionDivide_39'
   Pins(0)=EdGraphPin'EdGraphPin_3635'
   Pins(1)=EdGraphPin'EdGraphPin_3636'
   Pins(2)=EdGraphPin'EdGraphPin_3637'
   NodePosX=-1472
   NodePosY=-320
   NodeGuid=C709A9694402502ADA529EB3B34DF8FA
End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_208"
   Begin Object Class=EdGraphPin Name="EdGraphPin_3641"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3640"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3639"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3638"
   End Object
   Begin Object Class=MaterialExpressionClamp Name="MaterialExpressionClamp_31"
   End Object
   Begin Object Name="EdGraphPin_3641"
      PinName="Output"
      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_206.EdGraphPin_3632"'
   End Object
   Begin Object Name="EdGraphPin_3640"
      PinName="Max"
      PinType=(PinCategory="optional")
   End Object
   Begin Object Name="EdGraphPin_3639"
      PinName="Min"
      PinType=(PinCategory="optional")
   End Object
   Begin Object Name="EdGraphPin_3638"
      PinName="Input"
      PinFriendlyName=" "
      PinType=(PinCategory="required")
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_205.EdGraphPin_3631"'
   End Object
   Begin Object Name="MaterialExpressionClamp_31"
      Input=(Expression=MaterialExpressionSubtract'"MaterialGraphNode_205.MaterialExpressionSubtract_39"')
      MaterialExpressionEditorX=-1360
      MaterialExpressionEditorY=-416
      Material=PreviewMaterial'/Engine/Transient.PreviewMaterial_2'
   End Object
   MaterialExpression=MaterialExpressionClamp'MaterialExpressionClamp_31'
   Pins(0)=EdGraphPin'EdGraphPin_3638'
   Pins(1)=EdGraphPin'EdGraphPin_3639'
   Pins(2)=EdGraphPin'EdGraphPin_3640'
   Pins(3)=EdGraphPin'EdGraphPin_3641'
   NodePosX=-1360
   NodePosY=-416
   NodeGuid=25C578CD4C20DDEC7C9137BC7F875A88
End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_209"
   Begin Object Class=EdGraphPin Name="EdGraphPin_3643"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3642"
   End Object
   Begin Object Class=MaterialExpressionOneMinus Name="MaterialExpressionOneMinus_21"
   End Object
   Begin Object Name="EdGraphPin_3643"
      PinName="Output"
      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_207.EdGraphPin_3636"'
   End Object
   Begin Object Name="EdGraphPin_3642"
      PinName="Input"
      PinFriendlyName=" "
      PinType=(PinCategory="required")
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_210.EdGraphPin_3644"'
   End Object
   Begin Object Name="MaterialExpressionOneMinus_21"
      Input=(Expression=MaterialExpressionScalarParameter'"MaterialGraphNode_210.MaterialExpressionScalarParameter_50"')
      MaterialExpressionEditorX=-1568
      MaterialExpressionEditorY=-304
      Material=PreviewMaterial'/Engine/Transient.PreviewMaterial_2'
   End Object
   MaterialExpression=MaterialExpressionOneMinus'MaterialExpressionOneMinus_21'
   Pins(0)=EdGraphPin'EdGraphPin_3642'
   Pins(1)=EdGraphPin'EdGraphPin_3643'
   NodePosX=-1568
   NodePosY=-304
   NodeGuid=CD21FB1C4CDC941E4D4330A599582345
End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_210"
   Begin Object Class=EdGraphPin Name="EdGraphPin_3644"
   End Object
   Begin Object Class=MaterialExpressionScalarParameter Name="MaterialExpressionScalarParameter_50"
   End Object
   Begin Object Name="EdGraphPin_3644"
      PinName="Output"
      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_205.EdGraphPin_3630"'
      LinkedTo(1)=EdGraphPin'"MaterialGraphNode_209.EdGraphPin_3642"'
   End Object
   Begin Object Name="MaterialExpressionScalarParameter_50"
      DefaultValue=0.500000
      ParameterName="Angle_01"
      ExpressionGUID=4551FE154817876FEC73A8A3981C1380
      MaterialExpressionEditorX=-1712
      MaterialExpressionEditorY=-336
      Material=PreviewMaterial'/Engine/Transient.PreviewMaterial_2'
   End Object
   MaterialExpression=MaterialExpressionScalarParameter'MaterialExpressionScalarParameter_50'
   Pins(0)=EdGraphPin'EdGraphPin_3644'
   NodePosX=-1712
   NodePosY=-336
   bCanRenameNode=True
   NodeGuid=A7669FBD43E9CDC41A441C9E675E7A24
End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_211"
   Begin Object Class=EdGraphPin Name="EdGraphPin_3645"
   End Object
   Begin Object Class=MaterialExpressionVertexNormalWS Name="MaterialExpressionVertexNormalWS_15"
   End Object
   Begin Object Name="EdGraphPin_3645"
      PinName="Output"
      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_212.EdGraphPin_3646"'
   End Object
   Begin Object Name="MaterialExpressionVertexNormalWS_15"
      MaterialExpressionEditorX=-1728
      MaterialExpressionEditorY=-192
      Material=PreviewMaterial'/Engine/Transient.PreviewMaterial_2'
   End Object
   MaterialExpression=MaterialExpressionVertexNormalWS'MaterialExpressionVertexNormalWS_15'
   Pins(0)=EdGraphPin'EdGraphPin_3645'
   NodePosX=-1728
   NodePosY=-192
   NodeGuid=B83897C04557D220C7886882DFDD17FF
End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_212"
   Begin Object Class=EdGraphPin Name="EdGraphPin_3647"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3646"
   End Object
   Begin Object Class=MaterialExpressionComponentMask Name="MaterialExpressionComponentMask_31"
   End Object
   Begin Object Name="EdGraphPin_3647"
      PinName="Output"
      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_213.EdGraphPin_3648"'
   End Object
   Begin Object Name="EdGraphPin_3646"
      PinName="Input"
      PinFriendlyName=" "
      PinType=(PinCategory="required")
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_211.EdGraphPin_3645"'
   End Object
   Begin Object Name="MaterialExpressionComponentMask_31"
      Input=(Expression=MaterialExpressionVertexNormalWS'"MaterialGraphNode_211.MaterialExpressionVertexNormalWS_15"')
      B=True
      MaterialExpressionEditorX=-1568
      MaterialExpressionEditorY=-176
      Material=PreviewMaterial'/Engine/Transient.PreviewMaterial_2'
   End Object
   MaterialExpression=MaterialExpressionComponentMask'MaterialExpressionComponentMask_31'
   Pins(0)=EdGraphPin'EdGraphPin_3646'
   Pins(1)=EdGraphPin'EdGraphPin_3647'
   NodePosX=-1568
   NodePosY=-176
   NodeGuid=6529C7294AB1B5A79995049250D46015
End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_213"
   Begin Object Class=EdGraphPin Name="EdGraphPin_3650"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3649"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_3648"
   End Object
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      PinType=(PinCategory="optional")
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   Begin Object Name="MaterialExpressionAdd_3"
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   MaterialExpression=MaterialExpressionAdd'MaterialExpressionAdd_3'
   Pins(0)=EdGraphPin'EdGraphPin_3812'
   Pins(1)=EdGraphPin'EdGraphPin_3813'
   Pins(2)=EdGraphPin'EdGraphPin_3814'
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End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_285"
   Begin Object Class=EdGraphPin Name="EdGraphPin_3817"
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   Begin Object Class=EdGraphPin Name="EdGraphPin_3816"
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   Begin Object Class=EdGraphPin Name="EdGraphPin_3815"
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   Begin Object Class=MaterialExpressionMultiply Name="MaterialExpressionMultiply_38"
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   Begin Object Name="EdGraphPin_3817"
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      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_286.EdGraphPin_3818"'
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   Begin Object Name="EdGraphPin_3816"
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      PinType=(PinCategory="optional")
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   Begin Object Name="EdGraphPin_3815"
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      PinType=(PinCategory="optional")
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   Begin Object Name="MaterialExpressionMultiply_38"
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   MaterialExpression=MaterialExpressionMultiply'MaterialExpressionMultiply_38'
   Pins(0)=EdGraphPin'EdGraphPin_3815'
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   Pins(2)=EdGraphPin'EdGraphPin_3817'
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End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_286"
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   Begin Object Class=EdGraphPin Name="EdGraphPin_3819"
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   Begin Object Class=EdGraphPin Name="EdGraphPin_3818"
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   Begin Object Class=MaterialExpressionClamp Name="MaterialExpressionClamp_38"
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   Begin Object Name="EdGraphPin_3821"
      PinName="Output"
      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'"MaterialGraphNode_282.EdGraphPin_3808"'
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   Begin Object Name="EdGraphPin_3820"
      PinName="Max"
      PinType=(PinCategory="optional")
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   Begin Object Name="EdGraphPin_3819"
      PinName="Min"
      PinType=(PinCategory="optional")
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   Begin Object Name="EdGraphPin_3818"
      PinName="Input"
      PinFriendlyName=" "
      PinType=(PinCategory="required")
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   Begin Object Name="MaterialExpressionClamp_38"
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   MaterialExpression=MaterialExpressionClamp'MaterialExpressionClamp_38'
   Pins(0)=EdGraphPin'EdGraphPin_3818'
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End Object