Caustics are the effect of light as it passes through an object or as reflected off an objects

Stochastic Sampling present. The pattern of light rays traced within each cone of rays is randomized. This typically produces an image with a more realistic appearance.

Toon rendering is a new rendering and display option similar to OpenGL. The Toon renderer gives a cartoon-like rendering and allows you some control over the outline width and color.

Multiple Diffuse Ray Bounces. Determines how often a secondary ray is traced during reflections between adjacent objects. If a secondary ray reflects or bounces off another object, it may also reflect off a third object, which, if close enough, can possibly contribute to the primary object's surface illumination.