MinecraftForge/MinecraftForge — pull request #302 by MevansLK (2012-12-07 16:42:50+00:00)
Title: Lava/Water Collision Event

Added an event to handle the collisions between lava and water which would ordinarily produce either stone, cobblestone or obsidian. Handling this event will allow the collision to form a different block instead.

This is useful in dimensions that add new stone blocks.