When we started, it was always the mood, the light that we were concerned with. And even before more artefacts were done, we used some arbitrary grass and trees to experiment mood and get the sun just as we would like to see in that mood light in the morning.
We have moved further from this and have included clouds and sounds to add to the mood, as we detail out the game environment.
Let us know what you like and would like to have, what you think is missing in these.