Is it possible to create letters, for example, the letters have one shader, but the edge of the letters have a different shader?
Blender supports text objects. While you can extrude the text it doesn't provide a way to alter the material used on the sides. A solidify modifier can extrude the text shape and also allow assigning a different material to the side (and back if desired).
- Add a text object. ⇧ ShiftA->Text. Edit the object to alter the text, select the desired font.
- Create multiple materials.
- Add a solidify modifier, set the thickness to suit.
- Set the material index for the rim and back if desired. The material index is zero based which means 0 is the first material in the list and 1 is the second...