Material controls for the Caustics effect

Adjust the following Material controls to specify the reflection values of the cards:

Diffuse Reflection

Gives objects form-defining shading. Shading depends on the angle at which the light strikes the surface and is independent of the viewer's position.

Specular Reflection

Takes into account the position of the viewer. It models the reflection of the light source back to the viewer. It can create the illusion of shininess. For realistic effects, you can animate this control by using higher and higher values to mask the transition from filtered to nonfiltered versions of the layer.

Highlight Sharpness

Controls shininess. Very shiny surfaces produce small tight reflections, while duller surfaces spread the highlight out into a larger region. Specular highlights are the color of the incoming light. Because light is typically white or off-white, broad highlights can desaturate an image by adding white to the surface color.

In general, use the following process to adjust lighting: Set Light Position and Diffuse Reflection to control the overall light level and shading in a scene. Then adjust Specular Reflection and Highlight Sharpness to control the strength and spread of highlights. Finally, adjust Ambient Light to fill in the shadows.