Add a detailed mushroom cap style roof to the building system. The roof should have a mushroom texture on the top that can be recolored, and the under belly should feel like what is seen under a mushroom cap. The roof should be slightly hollowed, similar to being on a tower. The placement mechanic should be like the pyramid roof, allowing for hexagon, octagon, or any angular shape. Optionally, add vines and flowers to decorate on top, which can also be colored.