When the vanilla trees turn into round wood, the bottom squares appear perspective.
Here is my screenshot:
https://screenshot.net/gqp15h5
BetterFoliage version:BetterFoliage-MC1.12-2.2.0.jar
Forgelin version: Forgelin-1.8.3.jar
I am sorry, my English is not good, I am using Google Translate.