Adding normal bump

In the world of realtime rendering, there are several factors with which one can draw a line between the graphic of the current generation and the next generation. The most noticeable one is surely the 'normal bump' or the use of 'normal map'. The 'normal bump' has revolutionized the way polygon objects are rendered and upgraded the expected level of realism in the real-time world.

Here are two normal bump shader which have slightly different structures from each other.



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