minetest/minetest_game — pull request #139 by jojoa1997 (2013-03-10 03:08:53+00:00)
Title: adds obsidian

lava flowing with water makes stone.
lava source with water makes obsidian.
to make hard obsidian you smelt obsidian shards.
to make glass obsidian you craft it like this.
X=nothing, S=obsidian shard
XXX
SSX
SSX