well since no 1 made 1 yet. and a lot of people(i think) want to know how. here it goes how to make an glowing mushroom farm. what we need is: - mushroom grass seeds(you get them from chopping down glowing mushrooms trees and on the ground) please note it does grows but very slow, so its faster when you have a few seeds - mud blocks and we need to be underground at the level where you get rocks behind the wall(like sound also changed at this lvl). So this means it cant be like only 1 block underground! its a pretty way down. like on this screenshot wich kind of explains everything you need to know so just watch the screenshot. and no the water doesnt needs to be there and i dont know if it needs the space i just wanted to be sure for that havent seen big mushroom tree things grow so i dont know if thats even possible but normal mushrooms is i hope this helped you sorry for my English i got dyslexia so i cant really help it.