As a follow up to this post, another new feature coming to the beta Floor Builder will be custom music support (CMS). Similar to the planned custom texture support, CMS will let you use custom audio files in your floor for audio like the school music.
Also, my testing of this feature in a separate project also had good results. A short development video of some of this testing is included below. So, not only should you be able to make a custom floor with unique textures, but you'll also be able to include unique music in it as well that fits the floor's theme, leading to lots of customization possibilities!
