Is there a way to apply a material on only one side of a polygon normal and have the other side be a different material?
I guess you are looking for the backfacing input?
depending on what you are trying to do it might or might not be a good idea to use it though
Although I did not use the Transparent node. I want to see both sides, just a different texture on either side. Currently the opposite side is pure black, but that works for me for now.