Advanced aliens in pyramid cities needed to leave their home planet because a giant supernova exploded at just 10 light-years away and many planets are heavily bombarded with gamma rays.
The archive contains the pyramid city as a boolean object with toruses made by me and as separate scene.Feel free to modify or replace shapes with cylinders, cubes, or other primitive shapes and don't forget to set them properly as Negative , Positive or Intersect.
The planet scene is in Quality = Super and Priority CPU Usage = Normal at 1000x562.
The blue lights under pyramids are made in Photoshop, but the normal lights in Bryce are Visible objects so you can modify more easily in Photoshop or Bryce. « Less