Geometry
section
Displacement - enables or disables VRay's
own displacement mapping. Note that this has no effect on standard Max
displacement mapping, which can be controlled via the corresponding
parameter in the Render dialog.
Lighting section
Lights - enables or disables lights
globally. Note that if you uncheck this, VRay will use the default lights.
If you do not want any direct lighting in your scene, you must uncheck both
this and the Default lights parameters.
Default lights - enables or disables the
usage of the default lights when there are no light objects in the scene or
when you have disabled lighting globally (see the
Lights parameter).
Hidden lights - enables or disables the
usage of hidden lights. When this is checked, lights are rendered regardless
of whether they are hidden or not. When this option is
off, any lights that are hidden for any reason (either explicitly or
by type) will not be included in the rendering.
Shadows - enables or disables shadows
globally.
Show GI only - when this option is
on, direct lighting will not be included in the
final rendering. Note that lights will still be considered for GI
calculations, however in the end only the indirect lighting will be shown.
Materials section
Reflection/refraction - enables or
disables the calculation of reflections and refractions in VRay maps and
materials.
Max depth - enables the user to limit
globally the reflection/refraction depth. When this is unchecked, the depth
is controlled locally by the materials/maps. When this option is checked,
all materials and maps use the depth specified here.
Maps - enables or disables texture maps.
Filter maps - enables or disables texture
map filtering. When enabled, the depth is controlled locally by the settings
of the texture maps. When disabled, no filtering is performed.
Max. transp levels - this controls to what
depth transparent objects will be traced.
Transp. cutoff - this controls when
tracing of transparent objects will be stopped. If the accumulated
transparency of a ray is below this threshold, no further tracing will be
performed.
Override mtl - this option allows the user
to override the scene materials when rendering. All objects will be rendered
with the chosen material, if one is selected, or with default materials if
no material is specified.
Glossy effects - this option allows the
user to replace all glossy reflections in the scene with non-glossy ones;
useful for test renderings.
Indirect illumination section
Don't render final image - when this
option is on, VRay will only calculate the relevant global illumination
maps (photon maps, light maps, irradiance maps). This is a useful option if
you are calculating maps for a fly-through animation.
Raytracing section
Secondary rays bias - a small positive
offset that will be applied to all secondary rays; this can be used if you
have overlapping faces in the scene to avoid the black splotches that may
appear. See the
Examples section for a demonstration on the effect of this parameter.
This parameter is also useful when using the 3dsmax
Render-to-texture feature.
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