Caustics

Caustics are light patterns that are created when light has been refracted by one or more surfaces. Only mobiles can produce caustics in Awakening.
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To render caustics, follow these steps:

1. Create a Material with the Generate Caustic checked beforehand, set a proper Refraction Index for it: . You must set it's Alpha component to a diffuse color less than 255, to create transparency.

2. Assign this Material to a mobile.

3. Create a light and check it's Generate Caustic property:. The Detail option controls the 
lights emission-density for caustics.

4. Press F8 to render the caustics. You can render caustics for specific mobiles or lights by 
selecting them before rendering.

Refraction Indexes of familiar materials: