Bent stem texture plane in attached stems floats off of farmland by one pixel

The attached stem template model is defined wrongly: while the two crossed planes at the bottom start at Y -1, the bent stem starts at Y 0. This results in the bent portion hovering above the farmland slightly.

This is an easy fix - simply change the model so it starts at Y -1 and ends at Y 15, rather than the current way where it starts at Y 0 and ends at Y 16.