Hi Marassassin -
The Dot product is functioning correctly as you have it plugged up. The issue is that you have a normal map plugged into the dot product so it is using the vectors described by the map to determine the first set of vectors placed into the dot product. What I think you might be after is having the normal vectors influence the dot products results after a Vertex and Camera Vector have been passed in (like in the first image above).
To that end, I would take the results of the Vertex and Camera Vector from the first image and multiply it by the red and green channels of your normal map then add the results together. This should get your the result I believe you are looking for. (See my screenshot below.)
If you are intersted or what to delve further, I would also recommend taking a look at [this website][1] for a great video on understanding how exactly the dot product works.
Thank You
Eric Ketchum
