Over one of the same as a lot of the same as a lot of the same as a lot of the same as a lot of the same as a lot of the same as a lot of the same as a lot of the same as a lot of the same as a lot of the same as a lot of the same as a lot of the same as a lot of the same as a lot of the same as a lot of the same as a lot of the same as a lot of <| sep |> Every planet gets a random 100 digit number . Digit positions are interpreted like this 1 , 2 , 3 X , Y , Z position in space . 4 size of planet 5 color of planet 6 cloud type 7 temperature 8 number of flora 9 number of fauna . and so on . More complex in practice , but that ' s the idea . You don ' t need to store the visualization , just the rules on how to build it every time . DNA ?