2010

Table Of Contents
Increasing the Refractions setting allows the renderer to calculate what is seen
through the surfaces of the glass by allowing the light rays to refract the correct
number of times.
In the next step, you change the Refraction settings so that the bottle will
appear translucent when rendered.
To increase the refraction levels
1 In the Render Settings window, select the Quality tab and then open the
Raytracing attributes.
2 In the Raytracing section set the following:
Refractions: 6
Max trace depth: 8
The Refractions setting sets the number of times a light ray can be refracted.
When the setting is too low the ray does not penetrate through all of the
surfaces. The Max Trace Depth setting limits the total Refraction and
Reflection settings. By setting it to 8, you ensure that two reflection and
six refraction calculations can occur.
Photons refract in a manner similar to light rays when rendering. Increasing
the Refractions setting for the Caustic Photons ensures that the renderer can
correctly calculate the caustics that should occur with the bottle. In this case,
matching the Caustic Photon refraction settings with the Raytracing refractions
is a good practice.
To increase the photon refraction settings
1 In the Render Settings window, select the Indirect Lighting tab.
2 In the Photon Tracing section set the following:
Max Photon Depth: 6
Photon Refractions: 6
The Max Photon Depth setting limits the Refraction and Reflection
calculations for the Caustic Photons to the limit set. The Photon Refractions
setting is similar to the Refractions setting for raytracing but sets the
refractions for the Caustic photons. Close the Render Settings window.
Render the scene using caustics | 529