How to calculate conversion between normal and height map?

[lajawi]

I am a Blender user and got myself a normal map, which I'd want to convert into a height map.
That is why I searched for conversion techniques and found this repository, and I have a few questions about it:

• How is the calculation between different maps being done?
• Would this be possible to reprocude only using math and vector math, procedurally?

[kmkolasinski]

Hi, here is the explanation about the math behind my method: https://github.com/kmkolasinski/AwesomeBump/blob/Release/ShortAbout.pdf

I think it contains all the information you need.