message: demo: Change default overdraw threshold to 1%
  Generally speaking overdraw optimizer is reasonably efficient at finding
  clusters even with threshold=1.0; since ACMR is pretty important in some
  passes, like shadow generation, where overdraw is not that meaningful,
  1.01 (1%) penalty is a more sensible default.
diff: @@ -285,7 +285,7 @@ void optComplete(Mesh& mesh)
  meshopt_optimizeVertexCache(&mesh.indices[0], &mesh.indices[0], mesh.indices.size(), mesh.vertices.size());
  // reorder indices for overdraw, balancing overdraw and vertex cache efficiency
  - const float kThreshold = 1.05f; // allow up to 5% worse ACMR to get more reordering opportunities for overdraw
  + const float kThreshold = 1.01f; // allow up to 1% worse ACMR to get more reordering opportunities for overdraw
  meshopt_optimizeOverdraw(&mesh.indices[0], &mesh.indices[0], mesh.indices.size(), &mesh.vertices[0].px, mesh.vertices.size(), sizeof(Vertex), kThreshold);
  // vertex fetch optimization should go last as it depends on the final index order
  