My plan includes a feature that I would like to be able to see through. How can I edit a library material so that it can be partially transparent?
Most of the materials in the library are set up to be opaque, so that they appear totally solid. In some situations, though, transparency can be a helpful attribute.
To change the transparency of a material
If the material is in a locked catalog, first make a copy, then paste it in to your User Catalog.
Right-click on the material copied into the User Catalog then select Open from the menu.
In the Define Material dialog:
Change the name of the material and replace it with something short and descriptive.
On the Properties panel, change the Material Class from its default of "Transparent" to "General Material".
Use the Transparency slide bar, or type a value in the edit box, to adjust the material's level of transparency.
Note:Transparency controls how opaque or transparent a material is. Most materials are opaque while some materials, such as glass, are partially transparent. In some situations, materials with transparency can slow down rendering speed. A transparency of 0%, with the slider all of the way to the left, is completely opaque.
Click OK to close the dialog and apply your changes to this new material.