Day/night and Weather effects
Durign the last week we've been adding day/night effects as well as weather effects to the game.
The day/night will run in a cycle, or you can disable the cycle and set it to a specific value. The interface is a little poor at the moment, but that will improve eventually.
We've also been working to add weather effects. This is done using the particle engine. There is only rain at the moment, but others will come later, such as snow. Early versions had point particles for the raindrops, but after a rejig of the particle system a little, we now have line particles, which looks much nicer.
These changes will be available in the next release, or you can get them from the weekly builds.