weird lighting effect when I created a very large world

[lime storm]

So I went on to TEdit and made a very large scale world that has massive mountains and groves I went to join the world and there was a lighting effect where the surface blocks were showing as far as my light from my character could reach but otherwise it is just invisible blocks after that

[frigid panther]

This is a known rendering issue in terraria. I think you can add walls to help.

It is due to the way background layers are rendered at different map heights