Quite a lot of new features have been added recently - loding time, building clusters, half-height, lakes, ..., but I cannot find any documentation how to take advantage of those. Info about dat files on wiki seems to be a bit outdated or incomplete. Where should I look?
It doesn't make it any better that loading time has been part of the dat file syntax for two years. The source code for the besch writers are probably the only thing that can be relied on. At least the code should be correct, although there is always the possibility that any comments are outdated.