Why the need for BTB? Can't I already do this in 3d Studio Max?
Yes you can, if you have the skills but even then the experienced builders are finding that BTB saves them time, especially when finetuning the track surface for great racing.
For the newcomer 3d Max is a general purpose tool with so many features that it scares many away, inlcuding myself, from building their own tracks.
BTB is a tool dedicated to building only one thing, racing tracks. Don't even dare think about building a chess set!