You didn't use any lights and it looks like the dome is white.

This means that the illumination is the same in all directions.

Do you understand the implications of that?

It means that the brightness of light reflected from a surface will be the same no matter which way it points. And normal mapping changes nothing but which way the surface points. You are using a lighting setup that makes it impossible to observe the effects of a normal map.

Also, when testing normal maps, you should not confuse yourself with color maps as well. We can't tell squat from your picture, because in the same places where the N-map is supposed to be doing something you have the C-map doing something. Very hard to tell what is or is not happening.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)