First two tiers are iced in buttercream. Top tier (the building) is covered in fondant. All accents are fondant, including the spiderman which was molded by hand. I should have used 50/50 gumpaste/fondant mix for spiderman though. He was a little more 'hunched over' than I wanted. Couldn't get him to stay upright. Turned out pretty good despite his lazy posture. :)