      
      draw_calls.push(DrawCall::load_model("house_one".to_string()));
      draw_calls.push(DrawCall::load_model("house_two".to_string()));
      draw_calls.push(DrawCall::load_model("house_double".to_string()));
      draw_calls.push(DrawCall::load_model("unit_floor".to_string()));
      draw_calls.push(DrawCall::load_model("hug_cube".to_string()));
      draw_calls.push(DrawCall::load_model("debug_cube".to_string()));