Although fields were created in DDProperties for Monolith spawning and Rift generation, they were mislabeled as reading the "World Rift Generation Enabled" property. I gave them proper names. I also changed the fields and names to be more intuitive and rewrote the descriptions. For instance, "MonolithSpawnDensity" is a misnomer because as density increases, there should be more Monoliths, not less. Now the properties clearly state how they affect a feature. I rewrote the conditions that used each property to correspond with those simplified descriptions and gave the properties default values that will match the generation rates seen before. I also made the rift generation code less cryptic and fixed a bug; there was a check that compared if a dimension was a pocket dimension by its name to prevent rift generation. That name check was wrong - it would never work. Now we check if the provider is an instance of pocketProvider. That will continue working even if we change the way that pocket dimensions are named.
DimDoors
Dimensional Doors for Minecraft Adds several items that allow the player to move between and create dimensions
see the MC forum topic for details