Curiosity has gotten the better of me. SylenThunder, when you are talking about height map what does that include. Is 256m the height from bedrock to upper sky limit? Is it possible to mod the heights? What I was thinking is what if the bedrock limit was -50 instead of -57 and the max upper limit of the sky was also dropped so it was only a certain height above the highest peak of the highest mountain (which you also limited yourself)? Would the loss of those bottom 7 blocks and x number of upper limit blocks make enough of a difference to the calculations the pc has to do to make the game run a little smoother? I know you would have to lose the ability to make those uber high tower bases or those deep underground bases (boo) (ok I heard that whoever did it), but would the smoother game play (if it works) make it worth it.
This is just my mind racing through these things as it is trys to get me to hurry up and get to a Christmas party so it can get liquored up so I may be spouting a bunch of horse pucks.