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

V-Ray for SketchUp
35

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Images below show the difference with and without the Affect Shadows checked.
Shadows of refractive materials
There is an Affect Shadow option to the right hand bottom corner of the Refraction dialog box, 
default is unchecked. When checked, the color of the transparent object will affect its shadow and 
it
'
s not black anymore. The shadow also becomes more depth as well.
It is recommended to always have
 Affect Shadows
checked, 
as it produces a more realistic effect
Image below shows the influence of Refraction Glossiness material to objects behind it. Objects 
further away become very blurry.
V-Ray for SketchUp
36

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Double-sided material
Under Options of each material, you will find this Double-sided selection. Default setting is 
checked. This option is particularly important for transparent material. When this option is 
unchecked, light that enters the inside surfaces will not be rendered and show up black. The reason 
to have this option is that sometimes you may want to uncheck this option when render object with 
translucent material (See next page) in order to get the right texture. 
Unless you want to create some special effects
, 
please
have
this
option
checked
The double sided option will not have any affect on the shadows of the object
Translucent material
We
'
ve talked about changing the Diffuse color to get the degree of transparency we want to create 
before. White means 100% transparent, black means 100% opaque. You can create translucent 
materials with colors anywhere between white and black. But now we want to introduce a different 
translucent material. It is related to special light absorption materials. 
Open file: 
and render it, you will get image
like below on
the
left
. 
You
will
see
that
colors
where