What is Lambda? It's the default theme in StepMania 5.1, but is also available standalone. It features a clean aesthetic with bold colors that reflects modern design trends, yet still maintains a suitable level of energy for a rhythm game. Under the hood, it's also a bit more future-proof than the previous theme, with certain screens featuring more prominent use of backend Lua code to replace legacy methods of rendering particular elements.The big thing about this theme is that it's actually rendering at 720p internally rather than 480p like previous defaults. This will break some things, but it gives us more room to work with, from a graphical standpoint, and it looks nicer on high resolution screens.You can download it on GitHub , and as mentioned, it has replaced the existing 5.0 theme as the default of StepMania 5.1 in its source code.: Version 2.0 features some major changes to the theme's appearance. If you liked the previous version better, as featured in 5.1 beta 1, you can download it here