User blog comment:BladesOfJustice/Obsidian Generator/@comment-82.161.163.198-20110904215512

I have tested the pyramid thing and it doesn't seem to make any difference. I did it by releasing a controlled amount of lava through a single block hole onto a pyramid, and collecting it in an identically shaped reservoir underneath the pyramid. There was exactly the same amount of lava in the bottom reservoir as there was in the top one before the pyramid.