message: Remove z component from mesh
  The z component is required to do ray casting on the CPU, however on the
  GPU we use a displacement map to do this, so we zero the z value.
diff: @@ -1300,6 +1300,14 @@ export class Tile implements CachedResource {
  diffuseColor *= texelColor;
  #endif`
  );
  +
  + // We remove the displacement map from manipulating the vertices, it is
  + // however still required for the pixel shader, so it can't be directly
  + // removed.
  + shader.vertexShader = shader.vertexShader.replace(
  + "#include <displacementmap_vertex>",
  + ""
  + );
  };
  }
  