Use this to change the color gradation of the background sky and sky rotation. The Sky Properties window looks like this:
Setting Sky Colors
The plan3D sky colors graduate from the top color down to the bottom. Adjust the handles to change the colors. Click the Apply button to see changes.
Hexadecimal Values: Uncheck to show decimal values.
Sky Rotation Speed and Direction
Orbit Sky rotation speeds can be in fractions such as .01 to better emulate real sky movement. Higher numbers will increase the speed significantly on faster computers. Set the direction to clockwise or counterclockwise depending on which planet you live on (we are looking ahead.)