Terrain tesselation and dynamic shadows

Still able to consistently reproduce it in a clean project on 4.13 p2

    1. Create new project, blueprints,
      3rd person template
    1. Create new level, default preset
    1. Turn off smooth fps in project
      settings
    1. Make a terrain material, exactly
      as displayed on your screenshot
    1. Set tessellation multiplier to
      zero
    1. Compile material, and create its
      instance
    1. Create a landscape, 505 resolution
      63 quads per section, 1 section per
      component
    1. Assign above-mentioned material
      instance to the landscape
    1. Create landscape layer data for
      two layers, weight-blended