Allows any entity to move trough leaves blocks as long as it has passenger that can control it (i.e. player on the horse). This doesn't make leaves have no collision at all.
In addition to that makes camera ignore collision of leaves as long as you able to control vehicle entity.
Mod has to be installed on both server and client in order to work correctly.
Because navigating trough forests on big mounts as horses sucks, especially jungles. This greatly limits their usage.
Any mod that changes leaves block collision shape (more specifically makes its own version of getCollisionShape() method (Yarn mappings) in LeavesBlock.class). Mod may take no effect if leaves block added by mod gives it custom collision.
In less technical terms, if other mod messes with collision of leaves, it can be incompatible with this mod
