In writing you can have your skeleton, you're structure, but it doesn't reflect. The reflection comes in the polish. What a person will see, what a person will feel, comes in the polish. When you finish polishing your writing, it forms the image you're trying to create. It's like the very first rehearsal of a play, where the director moves the actors around mechanically to get a feel of the action.
Characters talk without expression.
In the second draft, I know where my characters are going, just as the director knows where his actors will move on the stage. But it's still rough and a little painful to read. By the third draft, the whole thing is taking shape. I have enough glimmers from the second draft to know exactly what I want to say. There may be two or three more drafts after the third to polish it up.