I suppose 3D models is the best place for these .atm files.

6 Vue atmospheres depicting 24 hours.
Sunrise - A slightly hazy dawn. The camera points south as the sun rises in the left.

Misty Morning - haze and fog are slightly increased to show a morning sun that has not yet burnt off the mist that rises from the dew-laden ground.

Noon - The mist has now burnt off in the warmest part of the day.

Late Afternoon - The sun is beginning to sink behind the clouds, casting a pale golden glow over the sky.

Golden Evening - Now the sun is sinking low in the sky.

Moonlit Sky - Prepare for danger by the light of the full moon.

Download for the zip file, and extract into your Vue folder. It should automatically merge with your atmosphere folder.