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illumination that results from this photon emission in a file called a photon
map. The overall caustic simulation is determined from the photon calculations
that result.
In addition to having the spotlight emit light into the scene you set the light
to also emit caustic photons. The overall caustic effect is determined from the
photon calculations that result.
To turn on the caustics lighting settings
1 In the Hypershade, double-click on the icon for spotLightShape1.
2 In the Attribute Editor, click the spotLightShape1 tab to display the
lighting attributes for the spotlight.
3 Open the mental ray section, and in the Caustic and Global Illumination
attributes set:
Emit Photons: On
Photon Intensity: 8000
Caustic Photons: 10000
4 Hide the Attribute Editor.
Rendering the scene with caustics
Now that the lights are set to emit caustic photons and the caustics preset is
turned on, youre ready to render an image using caustics.
Render the scene using caustics | 527