All connective in OF2A1, its pretty much an A to B map but I've adjusted the design a little to create a more interesting way of getting to point B, lighting does play a large part in most areas which are not shown, it's also hard to show how the lighting works with just static images too, for example the fan rooms have lights that activate and guide the player towards the broken fan section so you can advance to the next level.
But, as shown on the image, it's still very much WIP and appreciate your feedback, I'm still experimenting a lot with the lighting across OF2A1 and will admit some areas still need to be addressed, just wish I could show more though, would be a lot easier to talk about the level.