I'm wondering if anyone else has had this odd problem. Right now I'm building a mob tower and it isn't extremely high, not even close to the cloud limit. Whenever I'm at the top I sometimes experience slight jitters in fps (the smoothness of my gameplay not the actual) even though when I check it (with both fraps and debugging [F3]) it says 100+ FPS. This has me very confused. My only guess is that it's a bug with Minecraft since it hasn't always done that. One more note, I don't think it happens anywhere else but at my mob tower.
Have you tried reducing your rendering distance and turning off clouds? If this works it may just be a RAM problem in which you need a new RAM card. Otherwise, try the Optifine mod or enabling Open AdvancedGL.
Have you tried reducing your rendering distance and turning off clouds? If this works it may just be a RAM problem in which you need a new RAM card. Otherwise, try the Optifine mod or enabling Open AdvancedGL.
I never have lag anywhere though. I have 200 FPS a lot and I had about 150 FPS when it lagged a bit. My RAM is new and 8GB.
I have noticed something similar. I think it has to do with looking down from on high, so the game has to suddenly render many thousands of blocks. Tiny render distance should fix it, if you don't mind the fog.
I've had the same problem with my cow and pig farms. I think it's chunk loading lag because once I get to far away from it I get a huge lag spike for about 3 seconds and then my fps returns to normal. I tried tiny render distance but it doesn't help significantly.
The game doesn't load more chunks just because you are higher. In fact if you stand at bedrock the same number of chunks are loaded as if you were at build max hieght. However the game tries to only render viewable block space, and that can create screen tearing (the visual artifact I think you are describing) if you install optifine and choose to limit frame rate to a fraction of your monitors natural refresh rate you should see a drop in this kind of tearing (I think optifine calls it vsync).
Yes, a lot of times it does even though it says I still have 140 FPS!
I never have lag anywhere though. I have 200 FPS a lot and I had about 150 FPS when it lagged a bit. My RAM is new and 8GB.
What about your graphics card?
Also, you may want to update Java if you haven't already.
But it doesn't do it when I'm higher... Only in that certain spot and as said before I still have 140 FPS or at least it says so.