Now, I don't actually have a BP yet, but I have a bearded dragon and as a fellow reptile keeper I know that its very important to know just what it is you're getting into so research and asking the pros (that's you guys) is huge.
I was just planning on building a custom multi-unit display case for my beardie and to house a ball in the future and was wondering if just vinyl tiles, or maybe ceramic tiles would be alright to keep them on? I was planning on doing vinyl/ceramic anyway to separate the ball from the UTH which would have to be inside the enclosure (since its going to be wood), but would the "substrate" be necessary as long as the humidity is right? Being in the midwest, I typically have the humidity requirements pretty much spot on for a ball python anyway.
Only reason I ask is that I see plenty of people with just newspaper, and can't imagine that its really any different than that except that it gets cleaned rather than thrown away and replaced.