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VRay Object and Light Settings
In addition to the settings in the Render dialog, which are global for
the scene, you can set different render settings on a per-object basis. Some
of those properties (primary and secondary visibility, visibility to camera
etc) are accessible through the normal 3dsmax object properties page. VRay
also defines some additional properties which can be accessed by pressing
or button in the
VRay supports per object control of motion blur, indirect illumination
and shadow/matte properties. On the left is a list of all objects in the
scene and on the right are the properties. You can select multiple objects.
There is also a list of MAX selection sets to make the interface more
convenient and efficient.
Use default moblur samples - when this
checkbox is selected the Geometry Samples
value will be taken from the global
Motion blur roll-out.
Motion blur samples - here you can set the
number of geometry samples for the selected objects, if
Use default moblur samples is off.
Generate GI - this setting controls
whether the object(s) will generate indirect illumination. You can supply a
multiplier for the generated indirect illumination.
Receive GI - this setting controls
whether the object(s) will receive indirect illumination. You can supply a
multiplier for the received indirect illumination.
Generate caustics - when this setting is
checked the selected objects will refract the light coming from light
sources that are caustics generators, so that caustics are produced. Note
that in order to generate caustics an object must have a reflective or
Receive caustics - when this setting is
checked the selected objects will become caustic receivers. When light is
refracted by objects that generate caustics the resulting caustics will be
only visible when they are projected on caustics receivers.
Caustics multiplier - this value is a
multiplier for the caustics generated by the selected object(s). Note that
this value has no effect unless Generate caustics
VRay does not completely support the Matte/Shadow material of 3dsmax.
However, VRay has its own matte system. You can control matte properties
either on an object level through the Object settings dialog, or on a
material level through the special
Matte object - checking this option will
turn the object into a matte object. This means that the object will not be
directly visible in the scene; instead, the background color will be shown
in its place. However, the object will appear normally in
reflections/refractions and will generate indirect illumination based on its
Alpha contribution - this allows you to
control how the object will appear in the alpha channel. Note that this
parameter does not require the object to be a matte object - this parameter
has an effect on all objects. A value of 1.0 means that the object will
appear normally in the alpha channel. A value of 0.0 means that the object
will not be present in the alpha channel at all. A value of -1.0 will invert
the alpha of the object. Note that turning an object into a matte object
does not change its appearance in the alpha channel. You need to explicitly
change its alpha contribution.
Shadows - this will make the matte object
Affect alpha - this will cause the shadows
to affect the alpha of the object.
Color - the color of the shadows.
Brightness - the brightness of the
Reflection amount - if the material of the
object is a reflective VRay material, this controls how much of the
reflection will be visible on the matte object.
Refraction amount - if the material of the
object is a refractive VRay material, this controls how much of the
refraction will be visible on the matte object.
GI amount - this controls how much of the
indirect illumination received by the object will be visible on the matte.
No GI on other mattes - this will cause
the object to appear as a matte object in reflections, refractions, GI etc
for other matte objects. Note that if this is ON, refractions for the matte
object might not be calculated (the object will appear a matte object to
itself and will not be able to "see" the refractions on the other side).
this dialog you can specify properties of the lights in the scene with
regards to caustics and global photon mapping. On the left is a list of
light sources in the scenes and on the right are the light settings. You can
select multiple light sources. There is also a list of MAX selection sets to
make the interface more convenient and efficient.
Generate caustics - when this
setting is checked, VRay will generate caustic photons for the selected
light sources. Note that to obtain the caustics effect you must set the
appropriate value for the Caustics multiplier
below as well as put some objects that generate caustics in the scene.
Caustic subdivs - this option controls the
amount of photons that VRay will trace to estimate caustics. Large numbers
slow down the calculation of the caustics photon map and may take more
Caustics multiplier - this value is a
multiplier for the generated caustics by the selected object. Note that this
multiplier is cumulative - it does not override the multiplier in the
render roll-out section. The multiplier has no effect unless
Generate caustics is checked.
Generate diffuse - when this is checked,
VRay will generate diffuse illumination photons for the selected light
sources. See the
Global photon map section
for more details.
Diffuse subdivs - controls the number of
diffuse photons traced for the selected light(s). Larger values mean a more
precise photon map, but will take more time and memory.
Diffuse multiplier - a multiplier for the