8

Raytracer Controls Rollout 1363
Inter face
Local Options group
Enable Ray tracing—Turnstheraytraceronoroff.
Default=on.
Even with raytracing off, Ray trace material
and Raytrace map still reflect and refract the
environment, including both the environment
map for the scene, and the environment map
assigned to the Raytrace material.
Raytrace Atmospherics—Turns the ray t racing
of atmospheric effects on or off. Atmospheric
effectsincludefire,fog,volumelight,andsoon.
Default=on.
Enable S elf Reflect/Refract—Tur ns self
reflection/refraction on or off. Default=on.
Can an object reflect itself? For example, a teapot’s
body reflects the teapot’s handle, but a sphere will
never reflect itself. If you don’t need this effect, you
can improve render time by turning off this toggle.
Tip: If you have a transparent object such as glass,
and Enable Self Reflect/Refract is on, you don’t
have to m ake the object
2-sided (page 3–995) .The
raytracer sees back faces when exiting refractive
objects.
Reflect/Refract Material IDs—When on, the
material reflects effects assigned to material IDs in
the renderer’s
G-buffer (page 3–1040) on or off.
Default=on.
By default, Raytrace material and R aytrace map
reflect effects assigned to a material’s ID, so that
G-buffer effects are not lost. For example, if a
raytraced object reflects a lamp made to glow with
the Video Post Glow filter (Lens Effects Glow), the
reflectionglowsaswell.
Raytracer Enable group
These two check boxes turn raytracing of
reflections or refractions on or off for this material.
If you are using the Raytrace material to create
only reflections or refractions, turn off the one you
aren’t using to improve rendering time.
Raytrace Reflections—Turnsraytracingofreflective
objects on or off. Default=on.
Raytrace Refractions—Turnsraytracingof
transparent objects on or off. Default=on.
Local E x clud e—Displays the local Exclude/Include
dialog (page 2–1372)
.
An object that is excluded locally is excluded from
this material only.
Tip: Using exclusion lists is one of the best and
simplest ways to speed up the ray tracer.
Bump Map Effect—Adjusts the effect of bump
maps on raytraced reflections and refractions.
Default=1.0.
Falloff End Distance group
Reflect—Dims reflections to black at this distance.
Default=100.0.
Refract—Dims refractions to black at this distance.
Default=100.0.
Note: The toggles for Reflect Falloff and Refract
Falloff aren’t animatable.