Personally and professionally I always preferred fully shaved pussies.
Everybody can imagine why
But well shaped bush (Leanna for eg) can also be good.
On the set being shaved means that you may clean yourself easily and if you are shooting DAP, DP and so on, people may better appreciate the juicy and opened pussy.
More, dicks can fill in smootly and you can avoid some unpleasant stretching of body hairs.
Again, shaved pussy may be wet but taste better even for actors (and again no hairs over the tongue).
So, enough reasons to be shaved.
After it depends on local habits and traditions but I would say that more and more girls now shave themselves even if they feel like a baby
Sometimes it still happens that a newbie come with a bush but you offer them a razor (if you are in a rush) or a more professional intervention and that's all. You keep nice pix of the bush and after you start shooting with a beautiful pink and shaved pussy.