title: Shader to bevel the edges of a cube?
body: <p>This question relates to using shaders (probably in the Unity3D milieu, but Metal or OpenGL is fine), to achieve rounded edges on a mesh-minimal cube.</p>
  <p><img src="https://i.stack.imgur.com/TZCPW.png" alt="enter image description here" /></p>
  <ul>
  <li><p>I wish to use only 12-triangle minimalist mesh cubes,</p>
  </li>
  <li><p>and then via the shader,</p>
  </li>
  <li><p>Achieve the edges (/corners) of each block being slightly bevelled.</p>
  </li>
  </ul>
  <p>In fact, can this be done <strong>with a shader</strong>?</p>