From a post about ‘LayOut’
If you create pipe models, cylindrical objects, tic-tac shapes or beveled objects, and you make them for presentation in LayOut, you can change the default number of segments for Circles (24) to 6 or Arcs (12) to 2-3, they will look ok and you will have a much lighter model.
And then, if you need details for rendering or 3D printing, use SUbD on those lowpoly parts.
