Functional Lights functions change the colors of an image according to the pattern of a sine wave, or an application-defined pattern. The image will appear to have circles or bars of light and/or shadow overlaid on top of it.

• The IG_FX_directional_light function adds bars of light according to a sine wave pattern.
• The IG_FX_radial_light function adds circles of light according to a sine wave pattern.
• The IG_FX_free_directional_light function adds bars of light according to a custom pattern.
• The IG_FX_free_radial_light function adds circles of light according to a custom pattern.

Original	Directional Light Effect
Radial Light Effect	Free Directional Light Effect