U g I n f o r d e s I g n e r s

V-Ray for SketchUp
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HSV Exponential and Exponential is very similar, but will keep the tune and intensity of the color, like image
on
the
bottom
left
. 
Intensity Exponential can maintain the RGB ratio, and will only affect the color intensity, light image on the 
bottom right.
Types of Color Mapping
Open Color Mapping under Options, V-Ray default is 
set to Linear Multiply option.
Linear Multiply simply means that the color will not 
be changed from the generated value to the 
displayed value.
Exponential is using color intensity to control brightness and prevent wash out situation, but objects
' 
color
The Function of Color Mapping
Color mapping is used to adjust how color are actually displayed for a given image. When V-Ray determines a 
color value for a given pixel this value is then interpreted based on the type of mappings in use. This is very 
useful for minimizing the amount of an image which is out of the range of what can be displayed on a monitor.
Color Mapping
V-Ray for SketchUp
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Fix Rate Sampler
Adaptive QMC Sampler
Fixed Rate Sampler works in much the same way as the Adaptive Subdivisions sampler does, but it 
does not have the compacity 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 QMC Sampler is a very good sampler and pairs very well with using QMC for primary 
bounces. Similar to QMC the Adaprive QMC Sampler is best used for scenes with lots of small 
details. Although Adaptive QMC is not always the fastest method for calculating antialiasing, it 
typically produces quality results.
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
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 and had some broken line 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. Same as previous discussion about Min 
Rate and Mat Rate, use proper value to create accurate rendering. For this example, set the Min 
rate directly to 0 will fix those broken lines, as in the image on the right.
Adaptive Subdivisions Sampler
Adaptive Subdivisions control