Double-sided shading lets you shade a surface with one material on one side and a different material on the other side. This is the only way you can apply more than one material to a NURBS surface. You use both the
Condition and
Sampler info utility to create this effect.
To create a double-sided shaded surface
- In the
Hypershade, create one of each of the following:
- Material (this procedure uses a
Phong material).
- A
Sampler Info utility. The
Sampler Info
utility provides access to camera and surface information that you can pipe into your shading networks during rendering.
- A
Condition utility. The
Condition utility lets you specify which texture is mapped to each side of the surface.
- Checker texture.
- Crater texture.
- Assign the
Phong
material to the surface.
- In the
Hypershade, connect the
Checker’s
Out Color attribute to the
Conditions
Color If True attribute .
- Connect the
Crater’s Out Color attribute to the
Condition’s
Color if False attribute.
- Connect the
SamplerInfo
Flipped Normal attribute to the the
Condition’s
First Term or
Second Term
attribute.
- Connect the Condition OutColor attribute to the
Phong Color attribute.
- Perform a test render.
Maya shades each side of the surface with a different texture.
Swapping the textures on the surfaces
You can use the
Condition utility to specify which texture is applied to the front and back sides of the surface.
To swap texture mapping for double-sided shading
- Select the
Condition node. In the
Property Editor,
Condition Attributes section, change the
Operation attribute to
Not Equal (or if it is set to
Not Equal, change it to
Equal).
- Perform a test render. The following shows the result.
Note:
You can apply more than one material to polygonal models at the face level.