It's been a few years since this project was worked on. If it doesn't require an major changes then SFML should be updated to it's newest version.

Will make it easier to view the readme and easier to expand the solution with other projects in the future.

Dear ImGui is more regularly updated, and in my experience much easier to use than TGUI. Requiring less setup work to create a piece of a GUI and less work to make a GUI look good. It also comes with many more niceties built in. TGUI should be completed replaced with ImGui to improve the UX and GUI programming.

This goes along with #2 . Lexical_cast was only used to convert data for rapidjson's use. The new json library handles this conversion itself, so this dependency is no longer necessary. Also simplifies the project as it no longer depends on so many boost files.

I was still very new to C++ when I started using rapidjson, so chances are that it has a similar functionality, and I just missed it then.

Replace simplex noise code with libnoise or one of it's variants, such as FastNoise or FastNoise SIMD. This should allow for much more interesting heightmaps. See here for examples on another one of my projects.

Rapidjson was originally chosen as I was looking for a fast json library. Turns out it was a massive pain to use. On later projects I tried out Json for Modern C++, and it was a much easier and straightforward library to use. Any possible speed differences are negligent since the json files are small and rarely loaded.