Rules of perspective make it so that when you look up, lines converge and distort in a way which jars with human perception.
However, when you look up in your scene in Unreal Engine, the building should look straight.
We need to correct that. There is a free and easy way to do this - without the need for extra plugins.
This is how to do it:
Pros of the method:
This method is great as it does not require extra plugins, which means that it is quick, easy and free to fix.
Cons of the method:
The cropping needs to be done in the post, which can be a little of a pain if you do a lot of compositing and have to incorporate a lot of changes.
Watch the video to find out How to fix vertical tilt-shift on Architecture in Unreal Engine: