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Arch & Design Material (mental ray) 1557
Objectsinmoltenchocolate
Advanced Renderin g Options rollout
These parameters define performance-boosting
options.
Reflections group
Max Distance—Allows limiting reflections to a
certain distance, which both speeds up rendering
and avoids pul ling distant objects into extremely
glossy reflect ions.
Fade to end color—When on, reflections fade
to this color. When off, reflections fade to the
environment color. The former tends to be more
useful for indoor scenes; the latter, for outdoor
scenes.
Avai lable only when Max Distance is on.
Left: Full reflections (Max Distance=off); Center: 100mm; Right:
25mm
Max Trace Depth—When this trace depth
is reached, the material behaves as if the
Highlights+FG Only switch is on; that is, it shows
only highlights and “emulated” reflections created
with the help of Final Gathering.
Cutoff Threshold—The level at which reflections
are rejected; that is, not traced. It’s a relative value:
For example, t he default sett ing of 0.01 means that
rays that contribute less than 1 percent to the final
pixel are ignored. A setting of 0.25 means that
mental ray discards rays that contribute less than a
quarterofthevalueofthefinalpixel.
Refraction group
The optimization settings for refraction
(transparency) are nearly identical to those for
reflections. The exception is that of Color At Max
Distance, which behaves differently.