Radial Symmetry Sculpting in Blender 2.79 / 2.8

Martin Klekner writes:

Hello friends, welcome to this new tutorial from the Heroes of Bronze series.

This time I will show you how to use Blender's Radial Symmetry sculpting tools to create a Greek radial wave pattern (both in Blender 2.79 and 2.8).
We will then bake this pattern into a texture map and use it to displace a low-poly plane by using the Micropolygon Displacement.