How to procedurally generate a branching tunnel for a mobile flyer?

Question

Game development

It is necessary to implement a procedurally generated tunnel for a mobile game. In the game, we simply fly through the tunnel, flying around obstacles. The difficulty lies in the fact that it is not so easy to generate a regular unidirectional tunnel, but how to make forks? So that the player can choose which direction to fly.

Answer 1

This is called a directed graph.
How do you generate a simple tunnel? If on the fly, then when creating each new waypoint, you can decide whether it will be a fork. If so, make two points and draw a tunnel.
If not on the fly, then a little more difficult. Please ask again in this case.