Basically, so far all I have created is an outline of some sort to show what I want.



You see, I want the middle to curve so it makes it look like you're in a tunnel. The ceiling and floor lines are just showing where I want them to be, haha. I'm having trouble with just about everything here.

I also want the ceiling and floor to blend with the wall like it's all one big tunnel. Sorry if I'm explaining what I want explained here poorly.