Modified terrain generation to make much more interesting terrain, from a game standpoint. (More flat ledges, fewer tall walls.) Real gameplay isn't implemented yet, but when it is this will pay off.
Created a new type of pseudo-fluid, "sediment." Sediment is mostly non-reactive and it doesn't flow. Instead, it forms smooth ramps and uneven floors. Real liquids tend to pool in depressions in these floors. Further modified terrain generation to lay some sediment, creating nicely sloping floors. More will be done with this soon to create more playable terrain.