So I visited the nether in the mod pack Big Dig, and now the game is literally unplayable for me. I get massive lag spikes, and I can't do anything. It is quite horrible. Is there a way of deleting the nether file out of my save so I could maybe prevent the lag? I was getting around 100fps before I went to the nether, and I had three quarries running, so I believe that deleting any recollection of going to the nether (besides items) should fix it. I have literally spent like five hours on this world and didn't go to the nether, because I never had to, and now I can't even play. :I