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

V-Ray for SketchUp
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2.45
2.40
2.35
2.30
2.25
2.20
2.15
2.10
2.05
2.00
1.95
1.90
1.85
1.80
1.75
1.70
1.65
1.60
1.55
1.50
1.45
1.40
1.35
1.30
1.25
1.20
1.15
1.10
1.05
1.00
Refraction IOR
Default set the Refraction IOR to 1.55
; 
please
refer
to
images
below
for
setting
of
IOR
to
create 
desire material. 
Please note that reflection and refraction IOR values are separate, but to achieve an accurate 
effect these values should be the same
1.517
1.472
1.309
1.77
1.77
1.33
Glass
Glycerin
Ice
Ruby
Sapphire
Water
IOR
Material
1.0
1.00029
1.329
2.0
2.417
1.57
Vacuum
Air
Alcohol
Crystal
Diamond
Emerald
IOR
Material
Adjusting Refractions with Index of Refraction
IOR (Index of Refraction) is used to calculate among of the light refracted from transparent object. 
The newly added IOR default is set to 1.55. Please see the chart for typical objects
' 
IOR
value
. 
V-Ray for SketchUp
34

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Gradient Map
Refraction Glossiness 0.6
Refraction Glossiness 0.6
Refraction Glossiness 1.0
Just like the intensity of the Fog Multiplier affects its transparency, the Refraction 
Glossiness in thicker object becomes more obvious. 
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0.55
0.60
0.65
0.70
0.75
0.80
0.85
0.90
0.95
1.00
Refraction Glossiness
Refraction Glossiness default is set to 1.00, please refer to images 
below for impacts on different settings of Refraction Glossiness. 
Images below set the Refraction IOR to 1.55, you can see the 
Glossiness changes
gradually
from
0.85. 
It
changes
rapidly
between
0.80 
and
0.75. 
When
the
setting
for
Refraction
Glossiness
remains
the
same
, 
different
Refraction
IOR
will
change
the
Glossiness
of
the
object
. 
The Glossiness of Refractive materials
Both refractive objects and reflective object have option setting for Glossiness. The difference is that 
Reflection Glossiness only affects
the surface
, 
where Refraction
Glossiness
will have an effect on the object’s 
transparency.
The Glossiness of a refractive object usually used to represent different type of glass, for example, frosted 
glass. The refractions will become more blurry as the value is decreased, and at a certain point these 
refractions will become so blurry that they prevent what is behind the object from being distinguished.