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Help with Shader not working on Mobile

We’ve got a shader in our game that’s not working on iOS, and I’m not seeing anything in the node tree that’s an immediately obvious culprit. I was hoping somebody with a little deeper knowledge of the mobile limitations of the UE4 Material Editor might be able to spot it. Any help getting this, or something similar, running on mobile would be much appreciated!

Here’s the general effect of the shader (there’s also some UV animation happening, which isn’t really conveyed by the screenshot):
http://7.t.imgbox.com/a7yFUrcq.jpg

Here’s the node graph as an image:
http://1.t.imgbox.com/RIepf11y.jpg

And here’s a pasteable version of the node graph if you want to look at it in the material editor.



Begin Object Class=MaterialGraphNode_Root Name="MaterialGraphNode_Root_0"
   Begin Object Class=EdGraphPin Name="EdGraphPin_75771"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75770"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75769"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75768"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75767"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75766"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75765"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75764"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75763"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75762"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75761"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75760"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75759"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75758"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75757"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75756"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75755"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75754"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75753"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75752"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75751"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75750"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75749"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75748"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75747"
   End Object
   Begin Object Name="EdGraphPin_75771"
      PinName="Material Attributes"
      PinType=(PinCategory="materialinput")
   End Object
   Begin Object Name="EdGraphPin_75770"
      PinName="Customized UV7"
      PinType=(PinCategory="materialinput")
   End Object
   Begin Object Name="EdGraphPin_75769"
      PinName="Customized UV6"
      PinType=(PinCategory="materialinput")
   End Object
   Begin Object Name="EdGraphPin_75768"
      PinName="Customized UV5"
      PinType=(PinCategory="materialinput")
   End Object
   Begin Object Name="EdGraphPin_75767"
      PinName="Customized UV4"
      PinType=(PinCategory="materialinput")
   End Object
   Begin Object Name="EdGraphPin_75766"
      PinName="Customized UV3"
      PinType=(PinCategory="materialinput")
   End Object
   Begin Object Name="EdGraphPin_75765"
      PinName="Customized UV2"
      PinType=(PinCategory="materialinput")
   End Object
   Begin Object Name="EdGraphPin_75764"
      PinName="Customized UV1"
      PinType=(PinCategory="materialinput")
   End Object
   Begin Object Name="EdGraphPin_75763"
      PinName="Customized UV0"
      PinType=(PinCategory="materialinput")
   End Object
   Begin Object Name="EdGraphPin_75762"
      PinName="Refraction"
      PinType=(PinCategory="materialinput")
   End Object
   Begin Object Name="EdGraphPin_75761"
      PinName="Ambient Occlusion"
      PinType=(PinCategory="materialinput")
   End Object
   Begin Object Name="EdGraphPin_75760"
      PinName="Clear Coat Roughness"
      PinType=(PinCategory="materialinput")
   End Object
   Begin Object Name="EdGraphPin_75759"
      PinName="Clear Coat"
      PinType=(PinCategory="materialinput")
   End Object
   Begin Object Name="EdGraphPin_75758"
      PinName="Subsurface Color"
      PinType=(PinCategory="materialinput")
   End Object
   Begin Object Name="EdGraphPin_75757"
      PinName="Tessellation Multiplier"
      PinType=(PinCategory="materialinput")
   End Object
   Begin Object Name="EdGraphPin_75756"
      PinName="World Displacement"
      PinType=(PinCategory="materialinput")
   End Object
   Begin Object Name="EdGraphPin_75755"
      PinName="World Position Offset"
      PinType=(PinCategory="materialinput")
   End Object
   Begin Object Name="EdGraphPin_75754"
      PinName="Normal"
      PinType=(PinCategory="materialinput")
   End Object
   Begin Object Name="EdGraphPin_75753"
      PinName="Opacity Mask"
      PinType=(PinCategory="materialinput")
   End Object
   Begin Object Name="EdGraphPin_75752"
      PinName="Opacity"
      PinType=(PinCategory="materialinput")
      LinkedTo(0)=EdGraphPin'MaterialGraphNode_1.EdGraphPin_75777'
   End Object
   Begin Object Name="EdGraphPin_75751"
      PinName="Emissive Color"
      PinType=(PinCategory="materialinput")
      LinkedTo(0)=EdGraphPin'MaterialGraphNode_0.EdGraphPin_75774'
   End Object
   Begin Object Name="EdGraphPin_75750"
      PinName="Roughness"
      PinType=(PinCategory="materialinput")
   End Object
   Begin Object Name="EdGraphPin_75749"
      PinName="Specular"
      PinType=(PinCategory="materialinput")
   End Object
   Begin Object Name="EdGraphPin_75748"
      PinName="Metallic"
      PinType=(PinCategory="materialinput")
   End Object
   Begin Object Name="EdGraphPin_75747"
      PinName="Base Color"
      PinType=(PinCategory="materialinput")
   End Object
   Material=PreviewMaterial'/Engine/Transient.ShieldBarrier_MAT'
   Pins(0)=EdGraphPin'EdGraphPin_75747'
   Pins(1)=EdGraphPin'EdGraphPin_75748'
   Pins(2)=EdGraphPin'EdGraphPin_75749'
   Pins(3)=EdGraphPin'EdGraphPin_75750'
   Pins(4)=EdGraphPin'EdGraphPin_75751'
   Pins(5)=EdGraphPin'EdGraphPin_75752'
   Pins(6)=EdGraphPin'EdGraphPin_75753'
   Pins(7)=EdGraphPin'EdGraphPin_75754'
   Pins(8)=EdGraphPin'EdGraphPin_75755'
   Pins(9)=EdGraphPin'EdGraphPin_75756'
   Pins(10)=EdGraphPin'EdGraphPin_75757'
   Pins(11)=EdGraphPin'EdGraphPin_75758'
   Pins(12)=EdGraphPin'EdGraphPin_75759'
   Pins(13)=EdGraphPin'EdGraphPin_75760'
   Pins(14)=EdGraphPin'EdGraphPin_75761'
   Pins(15)=EdGraphPin'EdGraphPin_75762'
   Pins(16)=EdGraphPin'EdGraphPin_75763'
   Pins(17)=EdGraphPin'EdGraphPin_75764'
   Pins(18)=EdGraphPin'EdGraphPin_75765'
   Pins(19)=EdGraphPin'EdGraphPin_75766'
   Pins(20)=EdGraphPin'EdGraphPin_75767'
   Pins(21)=EdGraphPin'EdGraphPin_75768'
   Pins(22)=EdGraphPin'EdGraphPin_75769'
   Pins(23)=EdGraphPin'EdGraphPin_75770'
   Pins(24)=EdGraphPin'EdGraphPin_75771'
   NodeGuid=BD8C4CE54043BD4505CC0D9E014DF59D
End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_0"
   Begin Object Class=EdGraphPin Name="EdGraphPin_75774"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75773"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75772"
   End Object
   Begin Object Class=MaterialExpressionMultiply Name="MaterialExpressionMultiply_0"
   End Object
   Begin Object Name="EdGraphPin_75774"
      PinName="Output"
      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'MaterialGraphNode_Root_0.EdGraphPin_75751'
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   Begin Object Name="EdGraphPin_75773"
      PinName="B"
      PinType=(PinCategory="optional")
   End Object
   Begin Object Name="EdGraphPin_75772"
      PinName="A"
      PinType=(PinCategory="optional")
      LinkedTo(0)=EdGraphPin'MaterialGraphNode_28.EdGraphPin_75849'
   End Object
   Begin Object Name="MaterialExpressionMultiply_0"
      A=(Expression=MaterialExpressionMultiply'MaterialGraphNode_28.MaterialExpressionMultiply_9')
      ConstB=5.000000
      MaterialExpressionEditorX=-253
      MaterialExpressionEditorY=132
      MaterialExpressionGuid=C71A42634D1FAD0A456ADA8D803CADB0
      Material=PreviewMaterial'/Engine/Transient.ShieldBarrier_MAT'
   End Object
   MaterialExpression=MaterialExpressionMultiply'MaterialExpressionMultiply_0'
   Pins(0)=EdGraphPin'EdGraphPin_75772'
   Pins(1)=EdGraphPin'EdGraphPin_75773'
   Pins(2)=EdGraphPin'EdGraphPin_75774'
   NodePosX=-253
   NodePosY=132
   NodeGuid=B1B931C2B64165FFF62623B3336ED105
End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_1"
   Begin Object Class=EdGraphPin Name="EdGraphPin_75777"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75776"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75775"
   End Object
   Begin Object Class=MaterialExpressionNoise Name="MaterialExpressionNoise_0"
   End Object
   Begin Object Name="EdGraphPin_75777"
      PinName="Output"
      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'MaterialGraphNode_Root_0.EdGraphPin_75752'
   End Object
   Begin Object Name="EdGraphPin_75776"
      PinName="FilterWidth"
      PinType=(PinCategory="required")
   End Object
   Begin Object Name="EdGraphPin_75775"
      PinName="Position"
      PinType=(PinCategory="required")
      LinkedTo(0)=EdGraphPin'MaterialGraphNode_11.EdGraphPin_75804'
   End Object
   Begin Object Name="MaterialExpressionNoise_0"
      Position=(Expression=MaterialExpressionMultiply'MaterialGraphNode_11.MaterialExpressionMultiply_4')
      Scale=50.000000
      Quality=1
      NoiseFunction=NOISEFUNCTION_Perlin
      OutputMin=0.500000
      MaterialExpressionEditorX=-768
      MaterialExpressionEditorY=512
      MaterialExpressionGuid=8B28B72844A08E88F72A98BDDCE35473
      Material=PreviewMaterial'/Engine/Transient.ShieldBarrier_MAT'
   End Object
   MaterialExpression=MaterialExpressionNoise'MaterialExpressionNoise_0'
   Pins(0)=EdGraphPin'EdGraphPin_75775'
   Pins(1)=EdGraphPin'EdGraphPin_75776'
   Pins(2)=EdGraphPin'EdGraphPin_75777'
   NodePosX=-768
   NodePosY=512
   NodeGuid=DBF06C08314F31189DB619BAA12A60FF
End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_2"
   Begin Object Class=EdGraphPin Name="EdGraphPin_75778"
   End Object
   Begin Object Class=MaterialExpressionTime Name="MaterialExpressionTime_0"
   End Object
   Begin Object Name="EdGraphPin_75778"
      PinName="Output"
      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'MaterialGraphNode_25.EdGraphPin_75837'
      LinkedTo(1)=EdGraphPin'MaterialGraphNode_26.EdGraphPin_75839'
   End Object
   Begin Object Name="MaterialExpressionTime_0"
      MaterialExpressionEditorX=-2304
      MaterialExpressionEditorY=384
      MaterialExpressionGuid=E4780ADD4848FFFD9C8D6AA2DA7F0D12
      Material=PreviewMaterial'/Engine/Transient.ShieldBarrier_MAT'
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   MaterialExpression=MaterialExpressionTime'MaterialExpressionTime_0'
   Pins(0)=EdGraphPin'EdGraphPin_75778'
   NodePosX=-2304
   NodePosY=384
   NodeGuid=3E36B23F2346F9A3EC44A1A3C039178A
End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_3"
   Begin Object Class=EdGraphPin Name="EdGraphPin_75779"
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   Begin Object Class=MaterialExpressionScalarParameter Name="MaterialExpressionScalarParameter_0"
   End Object
   Begin Object Name="EdGraphPin_75779"
      PinName="Output"
      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'MaterialGraphNode_23.EdGraphPin_75831'
   End Object
   Begin Object Name="MaterialExpressionScalarParameter_0"
      DefaultValue=0.990000
      ParameterName="Shield Health"
      ExpressionGUID=22F7B99F4FE6B81B4059358126F8F743
      MaterialExpressionEditorX=-2720
      MaterialExpressionEditorY=512
      MaterialExpressionGuid=314911A2497EB2330117F5A511EA3FC9
      Material=PreviewMaterial'/Engine/Transient.ShieldBarrier_MAT'
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   MaterialExpression=MaterialExpressionScalarParameter'MaterialExpressionScalarParameter_0'
   Pins(0)=EdGraphPin'EdGraphPin_75779'
   NodePosX=-2720
   NodePosY=512
   bCanRenameNode=True
   NodeGuid=86C73BDF6B45717FBAB2EBA2EE6B6223
End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_4"
   Begin Object Class=EdGraphPin Name="EdGraphPin_75785"
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   Begin Object Class=EdGraphPin Name="EdGraphPin_75784"
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   Begin Object Class=EdGraphPin Name="EdGraphPin_75783"
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   Begin Object Class=EdGraphPin Name="EdGraphPin_75782"
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   Begin Object Class=EdGraphPin Name="EdGraphPin_75781"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_75780"
   End Object
   Begin Object Class=MaterialExpressionTextureSampleParameter2D Name="MaterialExpressionTextureSampleParameter2D_0"
   End Object
   Begin Object Name="EdGraphPin_75785"
      PinName="Output5"
      PinFriendlyName=" "
      Direction=EGPD_Output
      PinType=(PinCategory="mask",PinSubCategory="alpha")
   End Object
   Begin Object Name="EdGraphPin_75784"
      PinName="Output4"
      PinFriendlyName=" "
      Direction=EGPD_Output
      PinType=(PinCategory="mask",PinSubCategory="blue")
   End Object
   Begin Object Name="EdGraphPin_75783"
      PinName="Output3"
      PinFriendlyName=" "
      Direction=EGPD_Output
      PinType=(PinCategory="mask",PinSubCategory="green")
   End Object
   Begin Object Name="EdGraphPin_75782"
      PinName="Output2"
      PinFriendlyName=" "
      Direction=EGPD_Output
      PinType=(PinCategory="mask",PinSubCategory="red")
   End Object
   Begin Object Name="EdGraphPin_75781"
      PinName="Output"
      PinFriendlyName=" "
      Direction=EGPD_Output
      PinType=(PinCategory="mask")
      LinkedTo(0)=EdGraphPin'MaterialGraphNode_28.EdGraphPin_75848'
   End Object
   Begin Object Name="EdGraphPin_75780"
      PinName="UVs"
      PinType=(PinCategory="optional")
      LinkedTo(0)=EdGraphPin'MaterialGraphNode_9.EdGraphPin_75798'
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   Begin Object Name="MaterialExpressionTextureSampleParameter2D_0"
      ParameterName="Pattern"
      ExpressionGUID=C18646CF4AD31E0F86158B94CCC4FBA1
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      Texture=Texture2D'/Game/Textures/Gradients/T_LineGradient.T_LineGradient'
      MaterialExpressionEditorX=-768
      MaterialExpressionEditorY=128
      MaterialExpressionGuid=13646E3A4E31CCD6F8406F9913BCD1B1
      Material=PreviewMaterial'/Engine/Transient.ShieldBarrier_MAT'
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   MaterialExpression=MaterialExpressionTextureSampleParameter2D'MaterialExpressionTextureSampleParameter2D_0'
   Pins(0)=EdGraphPin'EdGraphPin_75780'
   Pins(1)=EdGraphPin'EdGraphPin_75781'
   Pins(2)=EdGraphPin'EdGraphPin_75782'
   Pins(3)=EdGraphPin'EdGraphPin_75783'
   Pins(4)=EdGraphPin'EdGraphPin_75784'
   Pins(5)=EdGraphPin'EdGraphPin_75785'
   NodePosX=-768
   NodePosY=128
   bCanRenameNode=True
   NodeGuid=C95E934B3645D1F4275D85A136ECD140
End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_5"
   Begin Object Class=EdGraphPin Name="EdGraphPin_75786"
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   Begin Object Class=MaterialExpressionTextureCoordinate Name="MaterialExpressionTextureCoordinate_0"
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   Begin Object Name="EdGraphPin_75786"
      PinName="Output"
      PinFriendlyName=" "
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'MaterialGraphNode_6.EdGraphPin_75787'
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   Begin Object Name="MaterialExpressionTextureCoordinate_0"
      VTiling=0.500000
      UnMirrorV=True
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      MaterialExpressionGuid=57BBA67349F2D2F9202EC7A8CAE384CB
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   MaterialExpression=MaterialExpressionTextureCoordinate'MaterialExpressionTextureCoordinate_0'
   Pins(0)=EdGraphPin'EdGraphPin_75786'
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End Object
Begin Object Class=MaterialGraphNode Name="MaterialGraphNode_6"
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   Begin Object Class=MaterialExpressionMaterialFunctionCall Name="MaterialExpressionMaterialFunctionCall_0"
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   Begin Object Name="EdGraphPin_75789"
      PinName="G"
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'MaterialGraphNode_10.EdGraphPin_75799'
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   Begin Object Name="EdGraphPin_75788"
      PinName="R"
      Direction=EGPD_Output
      LinkedTo(0)=EdGraphPin'MaterialGraphNode_13.EdGraphPin_75809'
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   Begin Object Name="EdGraphPin_75787"
      PinName="Float2 (V2)"
      PinType=(PinCategory="optional")
      LinkedTo(0)=EdGraphPin'MaterialGraphNode_5.EdGraphPin_75786'
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I’m fairly certain it’s the ‘Noise’ node. That node is actually really expensive, you might be better off using a texture.

If you enable ‘Mobile Stats’ in the Material Editor, it’ll usually (but not always) tell you if there’s a problem at the bottom :slight_smile:

I think that may be noise node, but cannot check it atm.

Thanks, Nawrot and TheJamsh. I’ll try replacing that with a seamless noise texture and see if it helps!

Well, I haven’t tested on device yet (our build/deploy cycle takes a long time), but the mobile previewer likes it without the noise. Thanks so much!

Awesome! Glad it’s sorted :slight_smile: