Talk:Obsidian/@comment-4008443-20110604235424/@comment-98.204.209.254-20110724175521

I did this just by chance today, it totally works great. One modification to it was that I had a wooden platform just above the water so I didn't have to worry about breathing. You don't even need infinite water, I just had a pool I built using about as much water as can be seen in your screenshot. Using this method eats very little water or lava.

Another method that's useful to exploit is to have lava pour into a 1x1 access to water across a flat surface, so that the lava flattens out. Each block of obsidian only eats up a pixel or two of the lava's depth, so instead of getting one block of obsidian for one of lava, you can get dozens of bricks per square of lava.