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92 Chapter 17: Rendering
Decreasing the f-stop to narrow depth of field
Focalplanesetatthenearestapple,andf-stopsetto0.1.
Increasing the f-stop to broaden depth of field
Focal plane in same location, f-stop increased to 1.0.
Yo u s e t t h e f - S t o p i n t h e c a m e r a’ s D e p t h O f F i e l d
rollout. See Depth of Field Parameter (mental ray
Renderer) (page 2–1383).
Note: For Perspect ive viewpor ts, which have no
camera, the Render Scene d ialog > Renderer panel
> Camera Effects rollout (page 3–101) has explicit
Focus Plane and f-Stop settings.
Caustic Lighting Effe c ts
Caustics are the effects of light cast onto an object
viareflectionofforrefractionthroughanother
object.
Swimming pool rendered without caustics
Reflective caustics added to swimming pool
To ca lculate caustics, the mental ray renderer uses
the photon map technique (page 3–994).(Ray
trac ing can’t generate accur ate caustics, and they
aren’t provided by the default scanline renderer.)
You enable caustics on t he Render Scene dialog >
Indirect Illuminat ion panel > Caustics And Global
Illumination rollout (page 3–106). In addition, you
must designate:
• Which light objects can create caustics.
• Which renderable objects c an generate caustics.
• Which renderable objects can receive caustics.
The settings for generating and receiving caustics
are on the Object Propert ies dialog > mental ray
Panel (page 1–126).