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1. Re: Fake roughness map

   

   Reply by mAlkAv!An · Apr 2014 · Home› Technical Talk

   These are custom nodes, 'acos' and 'atan2' is not available via the default nodes.

2. Re: Fake roughness map

   

   Reply by deohboeh · Apr 2014 · Home› Technical Talk

   How do you create such a node?

3. Re: Fake roughness map

   

   Reply by mAlkAv!An · Apr 2014 · Home› Technical Talk

   https://docs.unrealengine.com/latest/INT/Engine/Rendering/Materials/ExpressionReference/Custom/index.html Use the code from the screenshot, "return atan2(x,y);" and "return acos(x);"