Unfortunately they still do not render. I am certain that the label has been enabled in the Labelling tab, and the limits are set to none. Sometimes I have to restart to program several times before the labels finally do render. Any other suggestions?
**After experimentation, I noticed what was wrong. My method was to keep the actual polygon item in the 2D layer, and make a copy of the polygon to place in the 3D layer for labeling purposes. I would turn off the polygon stroke in the symbol properties format window so there was not a redundant polygon. But the labels would not render. When I turned back on the polygon stroke, the labels would return.
My workaround is to make the color of my 3D polygon layer colorless.