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# Per-Pixel Lighting Might Almost Be Finished!!

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Thanks to the very interesting discussion over in GP&T I think I've got RM/POM cracked - or at least I'm satisfied that my observations aren't wildly wrong. Basically, enough to satisfy the length and detail I want to go into in my text...

Techniques                            | ps_4_0 instructions |--------------------------------------+---------------------+Normal Mapping                        | 9Parallax Mapping with offset limiting | 15Ray-traced POM/RM                     | 68Ray-traced POM/RM with self shadowing | 114

A fairly obvious jump in complexity for the two ray-traced alternatives. As part of the chapters conclusion I'll be doing a rough analysis on this sort of thing...

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