It's just a .png file and a node added to nodes file. Rip it out if you like.
No more overwriting of moretrees trunks (allready have facedir). Horizontal trunks can be disabled trunks_settings.txt. Ends of horizontal trunks no longer replace "solid" blocks. Amount of trunks can be changed in trunks_settings.txt.
Short standing trunks (1 node) and longer lying trunks (3 nodes). Support for (tiny) trees & moretrees.