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VRay for SketchUp Manual
V-Ray Two-Sided MaterialThe V-Ray Two-Sided
Material, or Vray2SidedMtl as it appears in V-Ray for SketchUp, 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 it's 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 Vray2SidedMtl
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 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 V-Ray 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 the spectrum will tend to yield results
of almost completely one material, which defeats the point of using the
two-sided material.
| 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. |
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