- We switched to our own Irrlicht fork allowing us to fix many longstanding bugs (text input, fullscreen, macOS support, graphics) and improve graphics in the future
- More efficient map compression using the Zstd format. This has been shown to result in 20-30% faster map generation!
- Formspec and Lua API features including a better Dynamic Media API and a PNG encoder
- Work has been done to implement dynamic shadows, but they were not ready to be included in this release
- Lots and lots of bug fixes and performance improvements
Note: This isn't a first but to avoid surprises we want to point out that once you have loaded a map in Minetest 5.5 you will not be able to load it in previous versions. Make backups first. (Client-server compatibility is untouched by this.)
Source code: Github.com