Sometimes you might not need 'relational' in the SQL sense of the word, you might find the way a 3D renderer, e.g. in a games engine, has a better way of repres

Sometimes you might not need 'relational' in the SQL sense of the word, you might find the way a 3D renderer, e.g. in a games engine, has a better way of representing hierarchical data. Even if you are not displaying the data you can query it and do things with it on a GPU.