normalmapping with 2 lights?

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Svenart
 #1
Hello together,

I want to add normalmapping to a game I´m working on in my free time. Everything is ok with one light, but I dont know how to make it with more lights. Can anyone help me with that? I tried it with the athena.bb normalmapdemo.

Also, how Is it possible to use specularity together with normalmapping?