Hi I recently made a Minecraft world for me and my friends to play on. we played for a little bit then decided to restart it because one of my friends started having connection issues after I restarted the server I noticed the lighting in most of the chunks around are base was messed up. I tried -placing blocks in it but it didn't fix. all of the articles I found say to optimize the world however you cant do that in 1.12.2 can someone help me?[/p]
Are you using shaders?