2008

Procedures
To render with caustics:
1 Select each object you want to generate caustics, either by reflection or
refraction. Right-click and choose Properties, then on the mental ray
panel of the Object Properties dialog, turn on Generate Caustics.
Objects receive caustics by default. If you think this value might have
changed for the objects you want to receive caustics, use those objects’
Object Properties dialog to make sure Receive Caustics is turned on. Also,
to speed rendering time, you might want to turn off Receive Caustics for
those objects that don’t need to show them.
2 In the Render Scene dialog, go to the Caustics And Global Illumination
rollout and turn on Caustics.
3 Adjust the caustics parameters to get the effect you want.
4 Render the scene.
To render with global illumination:
Objects generate and receive global illumination by default. If you think these
settings might have changed for any objects in the scene, use the Object
Properties dialog to make sure the proper settings are enabled.
1 Select each object you want to generate and/or receive global illumination.
Right-click and choose Properties, then on the mental ray panel of the
Object Properties dialog, turn on Generate Global Illumination and/or
Receive Global Illumination. Also, to speed rendering time, you might
want to turn off Receive Global Illumination for those objects that don’t
need it.
2 In the Render Scene dialog, go to the Indirect Illumination panel >
Caustics And Global Illumination rollout > Global Illumination (GI)
group and turn on Enable.
3 Adjust the global illumination parameters to get the effect you want.
4 For the final rendering, turn on Final Gather as well as Global
Illumination. See
Final Gather Rollout (mental ray Renderer) on page
6104 .
5 Render the scene.
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