Here you can control and
override many of V-ray’s
settings, mainly used to speed up test rendering.
You can turn off all
displacement, lights, default
max lights, hidden lights and
shadows by just unchecking
the appropriate check box!
The “don’t render final
image” button is used to let V-Ray only compute the GI (irradiance map for example) without actually rendering the image. Forget this for now :-) Turn all reflections and
refractions in the scene on
or off by unchecking the
check box. Very useful for
testing purposes. The max
depth controls the depth of
the reflection/refraction (the
number of times a ray can
reflect/refract before it is
being ignored in the raytracing
process).