Over the past two years of learning mapping myself, I have gathered many useful resources that helped me learn. In addition, I also started writing my own guides for new techniques and such.
There are some amazing tools being worked on such as a much improved version of NetRadiant with a bunch of new features, and even entirely new tools like the BSP importer addon for Blender, which lets you edit BSP files directly and even bake lightmaps inside Blender.
Big quality of life improvements like this AutoHotkey script for easy live shader editing and how to set up NetRadiant to automatically compile and launch the map ingame.
These are just a few examples. All this and so much more to come (some honestly mindblowing stuff in the works) is compiled neatly (somewhat) in the Trello board:
id Tech 3 Mapping Trello
