There is that place on map:
Exactly that hole:
If we get into this we can see throught textures because we are in that (look on upper corners):
A liitle bit go with mouse right and up and we can see a place where somebody could be:
After better correction we can see place when people land after jump from down:
I think it works in every hole in undergrounds.
What do you think about it?
In my opinion it can be useful in some cases. Maybe not exactly on that map but on anothers.
