Unreal Engine 4 Scripting with C++ Cookbook

Randomness – Perlin noise

Some shaders benefit from the ability to use random values. Each Material has a few nodes that can help add randomness to a shader. Randomness from a Perlin noise texture can be used to generate interesting-looking materials such as marbled materials. The noise can also be used to drive bump maps, height maps, and displacement fields for some neat effects.

Getting ready

Choose a material to which you'd like to add some randomness. Open the Material in the Material Editor, and follow the steps.

How to do it...

1. Insert a Noise node into your Material Editor window.
2. Normalize the coordinates of the object you're adding the noise to. You can use math such as the following to do so:
   1. Subtract the minimum from each processed vertex ...