Guide for Environment PBR Texture Creation using Photogrammetry

This is a preview (first few pages) of my photogrammetry guide for environment texture creation.
For those interested, full 196 pages version is available on gumroad:

https://gum.co/YanD

Covers all key information I thought might be useful when building photogrammetry based PBR textures. I was trying to set the price which would be affordable for everyone but also let me continue moving forward with the new one. Hope you enjoy it and find it useful. Feel free to message me on Artstation if you have any suggestions or feedback. There is still a few things I wanted to cover but with that approach it would never be released :). Thanks to everyone who bought it for support. It is really very appreciated.