This tutorial will teach you some basic and advanced techniques that will help you create an attractive Windows Vista wallpaper.
Open a new file with 1024x768 px and 72 dpi. Then paint it with the shown color?s code 171D37.

Select the next instrument
to draw an ellipse (the shadow).

Fill
0% on the layers.
Blending Options-Outer Glow

Make a copy of the new drawn ellipse and place them the way it is demonstrated below:

Selecting the previous instrument, create now the basis for a voluminous sphere.
Open a new file with 1024x768 px and 72 dpi. Then paint it with the shown color?s code 171D37.

Select the next instrument
to draw an ellipse (the shadow). 
Fill
Blending Options-Outer Glow

Make a copy of the new drawn ellipse and place them the way it is demonstrated below:

Selecting the previous instrument, create now the basis for a voluminous sphere.