Here you will be taught how to make realistic lightning.
1)Open a new file, around 400 x 300 pixels. with a white background.
2) Now set your forground color to white and background color
to black.
3) Go to FILTER > RENDER > CLOUDS
4) Go to FILTER > RENDER > DIFFERENCE CLOUDS.
5) Go to IMAGE > ADJUST > INVERT
6) Go to FILTER > RENDER > LIGHTING EFFECTS and use these setting. Make sure you set texture channel to Red and put the bar all the way to mountainous.
6) here my final result. You can change the color of the rock by picking different colors in the lighting effects options.
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