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.



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      PinType=(PinCategory="materialinput")
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      PinName="Customized UV7"
      PinType=(PinCategory="materialinput")
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      PinName="Customized UV6"
      PinType=(PinCategory="materialinput")
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      PinName="Customized UV5"
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      PinName="Customized UV4"
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      PinName="Customized UV1"
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      PinName="Customized UV0"
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      PinName="Refraction"
      PinType=(PinCategory="materialinput")
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      PinName="Ambient Occlusion"
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      PinName="Subsurface Color"
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      PinName="Emissive Color"
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      PinName="Roughness"
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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: