Board Thread:Bug Reports/@comment-28813058-20170429234854/@comment-28813058-20170507232240

LOTRMod wrote: After several years of seeing this bug reported we have still not managed to determine the cause. It seems to be a combination of Optifine and/or other mods and/or bad video drivers, in various situations.

One thing that almost certainly is not the cause is a lack of RAM, for if that were the case, the game would just crash.

I do wonder if it might be caused by the fact that the map image's dimensions are not powers of two, which I have heard causes issues with some older graphics drivers. It would be interesting if someone who experiences this bug could edit the mod's map.png image so as to make it either 2048x2048 or 4096x4096, and then see if the bug still occurs. How do you change the size of the image? I got the file but I can't figure it out.