You can add light sources to an RGB or grayscale image to create the illusion of spotlights, floodlights, or sunlight. You can specify the type and number of light sources, the intensity of the light, and the color of the light. You can also create embossed reliefs by applying a preset or modifying color channel information. You can use a preset light and texture style, or you can customize a preset style and save it in the preset list.
To apply a lighting effect
1.
Click EffectsCameraLighting effects.
2.
Click the Light source tab.
3.
Enable the Spotlight option in the Type area.
4.
In the preview window, drag the Light source selector to set the position and direction for the light.
5.
Type a value in the Angle box to set the angle of the light relative to the image.
6.
Move any of the following sliders:
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Brightness— lets you set the intensity of the light source
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Cone size— lets you set the width of the light beam. Higher values produce a wider, more diffused light beam.
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Edge— lets you set the diffusion of the light along the edge of the beam
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Opacity— lets you set the density of the light
7.
Click the Atmosphere tab, and move the Brightness slider to adjust the brightness of the entire image.
You can also
Change the color of the light
Click the Color picker, and choose a color swatch.
Add a light with the same properties as the last light applied
Click the Add light button .
Delete the last light applied
Click the Delete light button .
Hide/Reveal the Light source selector
Click the Hide/Reveal Light source button .
Add three-dimensional texture using a preset
Click the Presets tab, choose a preset that adds texture to the image, and click the Image texture tab to set the properties you want.
Add three-dimensional texture using color channels
Click the Image texture tab, choose a color channel from the Channels list box, and modify the settings you want.
Camera 
to set the position and direction for the light.
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