8

Translator Options Rollout (mental ray Renderer) 115
Note:
If you attempt to render motion blur with
the Grid method active, the mental ray renderer
automatically switches to the BSP method. This
happens in the
.mi file but is not reflected in
the 3ds Max interface.
•LargeBSP
The Large BSP method has the same controls
as BSP. See
Ray-Tr ace Acceleration: Parameters
for the BSP Methods (page 3–125)
.
This method is a variant of the BSP method.
Portions of the partitioning tree it uses can
be swapped in and out of memory. This
enables mental to render very large scenes, at
a cost of ray-tracing time. Use this method
for very large ray-traced scenes, and also
when Use Placeholder Objects is turned on
(see
Translator Options Rollout (mental ray
Renderer) (page 3–115)
). Use Placeholder
Objects is recommended when you are doing
distributed rendering (page 3–121) .
Trace Depth group
Trace depth controls the number of times a light
ray can be reflected or refracted. At 0, no reflection
or refraction occurs. Increasing these values can
increase the complexity and realism of a scene, at
a cost of greater rendering time.
Max. Depth—Limits the combination of reflection
and refract ion. Tracing of a ray stops when the
total number of reflections and refractions reaches
the Max Depth. For example, if Max Depth equals
3 and the two trace depths each equal the default
value of 2, a ray can be reflected twice and refracted
once,orviceversa,butitcan’tbereflectedand
refracted four times. Default=6.
Max. Reflections—Sets the number of times a ray
can be reflected. At 0, no reflection occurs. At 1,
theraycanbereflectedonceonly.At2,theraycan
be reflected twice, and so on. Default=6.
Max. R efractions—Sets the number of t imes a ray
can be refracted. At 0, no refraction occurs. At 1,
the ray can be refracted once only. At 2, the ray can
be refracted twice, and so on. Default=6.
Tra nsl ator Opti ons R oll out (menta l
ray Renderer)
Rendering menu > Render > Render Scene dialog >
Processing panel > Translator Options rollout
Main toolbar > Render Scene > Render Scene dialog >
Processing panel > Translator Options rollout
Note: The Processing panel appears only when the
mental ray renderer is the currently active renderer.
Controls in this rollout affect the general operation
of the mental ray renderer. They also control the
mental ray translator , which can save to an
MI file
(page 3–1066)
.Thetranslationisinmentalray
version 3 (mi3) format. Th e translator does not
support mental ray version 1 (mi1).
See also
Distributed Bucket Rendering Rollout (mental ray
Renderer) (page 3–121)
Procedures
To save the mental r ay renderer settings:
• When you have a set of rendering settings y ou
want to keep, go to the Render Scene dialog >
Processing panel > Process Options rollout. In
the Configuration group, click Save As Defaults.
To create a rendering f rom multiple passes:
1.
Use the Render Type (page 3–13) Selected
option to choose only a portion of the scene
to render.
2. On the Tr anslator Options rollout, in the
Render Passes group, click the “...” button next
to Save.