Certainly!

I can specify the amount of clouds, cloud color, the amount of stars, sky color, whether there is a "horizon," and many other things. So, just specify what you need. Are you thinking just a blue sky with clouds or... ? Also, tell me what size you want for the picture: 512 x 512, 256 x 256, etc.

I made a few samples at 512 x 512. First, a generic blue sky with clouds and sun, then the same sky with a "land," then a night sky.

Clouds.png
CloudsLand.png
Night.png

You may want to play around with the sky settings in dim3, but here's what I use:
Sky:
width: 15
height: 60
apex: 4

Texture:
x: 1
z: 3
y: 1

-Tim