Ok theres a thread in the commons over at DAZ  about V4's lack of transmapped brows.

Here http://forum.daz3d.com/viewtopic.php?t=49350&postdays=0&postorder=asc&start=0

For some reason they got it into their heads that most people dont use or care about transmapped brows (or pubic hair) so they left them off of V4. This is wrong I and quite a few others want them because  for one thing I got used to  using them and for another its easier on the texture creators wether they know it or not. NOW they have to make an option for all different color of brows so people can match their hair . (think about this texture creators part of it is your fault for painting brows on almost every damned V3 texture ever made I know some  don't do that and those are the best textures of all.) So since  everyone was putting brows and pubic hair on their textures they left off the transmaps because they thought no one gave a damn about them.

    So if you  want transmaps on V4 go tell them knowing the way things go  it won't do any good but then again this is DAZ we are talking about  so you never can tell.

(this is just  partially for curiosity because I have a hard time believing that the people who like the transmaps are a minority.)