I've posted a video of a complete winning journey through one of Rktcr's worlds.
This is shown in real-time, though it was constructed by a player using Rktcr's time control and future-visualization features.
More information, see this blog post.
Rktcr (pre-beta4) winning journey video
What's the name of that effect at 00:48 where you can see part of both worlds as you go through the portal?? That effect is just mind-boggling!