First, make a blank image, or open an image you want to add a sphere to
Then, use the circle marquee tool and make a selection in the shape of a circle Hold down the shift key on your keyboard while making the selection to keep the aspect ratio equal, thus creating a perfect circle. The size doesn't matter.
Now, select the gradient tool and choose a gradient that is one color going from light to dark. Also, make sure to select "radial gradient" next to the drop down box.
Then using the gradient tool, fill the circle something like this. You can experiment, different angles give different lighting effects:
Now you have a very simple sphere.
You can add reflection to it, if you wish
Sorry there isn't a reflection tutorial included, but you can find one somewhere else pretty easily. If there is high enough demand for it, I will show you how I did it.
Edited by Loman, 21 November 2006 - 08:10 PM.