VRay for SketchUp Manual
Adaptive Subdivision Control
The default setting
for Adaptive Subdivision can produce a good result. See image below on the left.
These thin lines rendered with default Adaptive Subdivisions have some broken
lines in the back.
Open Image Sampler under Options, V-Ray's default uses Adaptive Subdivisions
as its method of calculating antialiasing. Default Min Rate is -1, Max Rate is
2. Similar to the previous discussion about Min Rate and Max Rate, use proper
values to create an accurate rendering. For this example, set the Min rate directly
to 0 which will fix the broken lines, as in the image on the right.
Fixed Rate Sampler
Fixed Rate Sampler works in much the same way as the Adaptive Subdivisions
sampler does, but it does not have the capacity to use multiple levels of
subdivisions. Because of this, the Fixed Rate sampler is generally quite slow,
although it does produce very predictable results.
Adaptive DMC Sampler
Adaptive DMC Sampler is a very good sampler and pairs very well with using
DMC for primary bounces. Similar to DMC the Adaprive DMC Sampler is best used
for scenes with lots of small details. Although Adaptive DMC is not always the
fastest method for calculating antialiasing, it typically produces quality
Proper Adjustment of the Image Sampler has a direct impact on the speed and
quality of the final image. For faster previews you can decrease the Image
Sampler quality. For final renders it is very important to have a correct
setting because a poor setting can produce a poor quality image even if the
lighting calculations are very precise. In all cases higher subdivisions will
yield a better quality image.