V-Ray for Rhino Manual - Rum

V-Ray Two-Sided Material
The V-Ray Two-Sided Material, or Vray2SidedMat as it appears in V-Ray for Rhino, is a material
that allows easy creation of very thin translucent objects such as paper, lamp shades, or curtains.
It works with the very simple controls so its much easier to control the result then using a
translucent material, and it renders significantly faster as well. Due to the nature of this
material it is actually best to have single surfaces rather than a solid, as you would need for any
refractive material.
Adding a V-Ray Two-Sided Material
First we will need to add a Two sided
material. Open the material editor and
right-click on Scene materials and go to Add
Material. This will in turn bring up another
menu with several different material
formats. Click on Vray2SdMat which is in the
middle.
Working with V-Ray Two-Sided Material
Now that the Two-Sided Material has been
added, we will expand the material and
notice that this looks much different then
the standard V-Ray material. This is
because the Two sided material works with
predefined materials. There are two slots,
one for the front material and one for the
back material, as well as color which will
determine the ratio between the front and
the back material.
You cannot actually create a new material once inside the Two-Sided material as it only works
with predefined materials. When you click on the button for the front material, a dialog box will
open up asking you to choose which material you would like to have be the front material. You
must also define a material a material for both sides, but you can define the same material for
both sides. If you don’t specify a material for either the front or the back, then Vray will assume
that there is no material.
The color is how V-Ray determines the ratio of
front material to back material. The color works
with grayscale values, and produces the best
results between 35-220. Colors on either end of
If you would like to recognize which faces are the front and which are the back, then you can
configure backfaces to be a different color when they appear in the viewport. This can be
configured by typing AdvancedDisplay into the command line and configuring the backface color
in the desired display type.
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V-Ray for Rhino