This Tutorial will teach you how to create a Stained Glass Texture.
By the end of this Tutorial, your ouput should look something like this:
Fig 1.0 Steps
1) Select a Gradient of your choice.
Fig 2.0 2) Apply the Gradient to a New document and then go to Filter > Texture > Stained Glass...
3) A dialog box will pop up.Enter the following values:
Cell Size : 10
Border Thickness : 4
Light Intensity : 3
4) After that, press OK.
*Please note that the border's color can be changed by changing your foreground color.