User blog comment:TheHandsomePlant/NMT Side B levels!/@comment-26579645-20150907144809/@comment-25089892-20150911195633

The same day issue was with 3.9-beta and 3.9-official versions, and both of them shared the daylight environment, so I guess both 4.0-beta and 4.0-official will share the same. It would also make no sense to make first 16 levels daylight and next 16 nighttime. I copy-pasted the beta levels from the unfinished 4.0 section file and replaced existing levels with them. Of course, I had to replace all upcoming plants and zombies with existing ones to avoid game crashing.