Originally Posted by
pendennis
Let me add this: Not all lines can be "corrected". No matter how you look at a vertical structure, there will be some aspects that can't be corrected. Lines are not parallel from the ground, only degrees of conversion. The same goes for horizontal lines. As you look at horizontal lines from one end, they naturally converge in the distance.
However, you have to strike a balance between that, and the "falling over" effect when using wide angle there are just some things that are better left "less edited".