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How to use the NormalFromFunction material node?

How can I use the NormalFromFunction node in the material editor? The description and the input pins don't offer any explanation on how to use the function. Let's say I want to generate a normal map from the SphereGradient-2D function, how would I go about that? I'm assuming plugging the output of the SphereGradient-2D into all three Function(UV) inputs, but I tried several different functions and values for the other inputs and I only get a uniform, deep blue output.

The documentation is also missing any mention of this function. (https://docs.unrealengine.com/latest/INT/Engine/Rendering/Materials/Functions/Reference/Procedurals/)

Any suggestions?

Product Version: UE 4.15
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asked May 15 '17 at 01:49 PM in Using UE4

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There is a brief explanation about NormalFromFunction material function in this post.

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answered May 15 '17 at 02:22 PM

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avatar image HappyDay May 15 '17 at 03:11 PM

Thanks you very much. Offsetting the function by "Heightmap UV Offset" in x and y direction for the Function(UV2) and Function(UV3) inputs seems to produce acceptable results.

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