This mod makes small mushrooms render as 3D objects. I have tested it with Mineclonia, so it should work with MineClone2 or MineClone5.
Mcl Mushrooms 3D
Renders small mushrooms as 3D objects in MineClone2/MineClone5/Mineclonia
Renders small mushrooms as 3D objects in MineClone2/MineClone5/Mineclonia