You need to connect output of your Mix node to Normal input socket of Output node. Then you'll have bump mapping from your node setup. This is how texture node works.

Perhaps could be made a bit more clear, but texture nodes needs major redesign and currently being orphaned. So for now just connect stuff to normal output :)

Thanks for the report, but it's more like just specific of texture nodes..

Thanks for you review @Sergey Sharybin. I see you point.

But there's still something confused. I upload 2 new file try to clear my point (a Snapshot and a Blend file).

I know BI should be redesign later. but maybe that's a big problem before we finished redesige project.

Artist can't lost Procedural Normal map in scene design in a long time.

Thanks for you hard work.

Best wishes.

BI is not likely to be redesigned, it's redesign is called Cycles :)

As for baking normal map from node tree to an image, you then need to set Bump Mapping to "Original" method. The thing here is: images now uses much higher quality bump mapping filtering which is not implemented for texture nodes (and likely wouldn't be implemented for until texture nodes are rewritten from scratch, which is also unlikely due to Cycles).

For now just use Original bump mapping and you're fine :)