This mod will convert moss blocks into water sources. The crafting recipe for a water collector is in the images tab, once placed in a biome where it can rain while it is raining, it will convert into a full water collector after about 4 minutes, as long as it is exposed to the sky (make sure no blocks are on top). Once a full water collector, place a moss block directly on top of it and wait another minute, it will convert into a water source block (ensure there is nothing on top of the moss block and the moss block is exposed to the sky). This mod is intended for skyblock-like challenge maps where water may be inaccessible.
The Rain Collector (Water Generator) Team
