Just got the latest PV build loaded today after getting Beta 2 installed. First impressions are that the new environments are great; both in PV and Real View. There are not many times I've needed that too warm kitchen in a production rendering (count never). I agree with Kevin about the need to be able to shut off the ground plane and the reflections on the floor. I know you have two versions of each environment; one with reflections and one with just shadows. If we could reflections and the floor off within the environments, then you could cut the number of them in half.