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1356 Chapter 15: Lights and Cameras
Web File—
Selects an IES file to use as a photometric
web. Thedefaultwebisadiffusedistribution
shining from one edge.
XRotation—Rotates the photometric web about the
X axis. The center of rotation is the photometric
center of the web. Range=-180 degrees to 180
degrees.
YRotation—R otates the photometric web about the
Y axis. The center of rotation is the photometric
center of the web. Range=-180 degrees to 180
degrees.
ZRotation—Rotates the photometric web about the
Z axis. The center of rotation is the photometric
center of the web. Range=-180 degrees to 180
degrees.
Photometr ic web i con—Shows a three-dimensional
representation of the light distribution. See Web
Distribution (page 2–1326).
Rollouts for SpecificShadow
Typ e s
Advanced R ay -Tr aced Par ameters
Rollout
Create panel > Lights > Create or select a light. > General
Parameters roll out > Shadow type > Advanced Ray-traced
Shadows
Advanced Ray-traced shadows are similar to
ray-traced shadows (page 3–1000),however
they give you more control over shadow
behavior . Additional controls are available in the
Optimizations rollout (page 2–1361).
Advanced ray-traced shadows cast by an a rea light.
Interfa ce
Basic Options group
Mode—Selects the ty pe of ray tracing for generating
shadows:
•
Simple—Casts a single ray of light toward
the surface. No antialiasing (page 3–907) is
performed.
•
Antialias 1-Pass—Casts a bundle of rays.
The same number of rays is cast f rom each
illuminated surface. The number of rays is set
using the Pass 1 Quality spinner.
•
Antialias 2-Pass—Caststwobundlesofrays.
Thefirstbatchofraysdeterminesifthepoint
in question is fully illuminated, shadowed, or
in the penumbra (soft area) of the shadow.
If the point is in the penumbra, a secondary