Material Editor > Type button > Material/Map Browser > Double-Sided

On the right, a double-sided material creates a pattern for the inside of the trash can.
The Double-Sided material lets you assign two different materials to the front and back faces of an object.
To create a double-sided material:
Activate a sample slot in the Material Editor.
Click the Type button.
In the Material/Map Browser, choose Double-Sided and then click OK.
A Replace Map dialog is displayed. This dialog asks whether you want to discard the original material in the slot, or retain it as a sub-material.
The Double-Sided material controls let you choose the two materials, and the translucency of the material overall.
To make the material translucent:
Set Translucency to a value greater than 0.
The Translucency control affects the blending of the two materials. When Translucency is 0, there is no blend. When Translucency is 100.0 percent, the outer material is visible on inner faces and the inner material is visible on outer faces. At intermediate values, the specified percentage of the inner material "bleeds through" and is visible on outer faces.

Translucency—Sets the amount that one material shows through the other. This is a percentage that can range from 0.0 to 100.0. At 100 percent, the outer material is visible on inner faces and the inner material is visible on outer faces. At intermediate values, the specified percentage of the inner material "bleeds through" and is visible on outer faces. Default=0.0.
You can animate this parameter.
Facing Material and Back Material—Click to display the Material/Map Browser and choose a material for one side or the other.
Use the check boxes to turn the materials on or off.
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