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Old 05-25-03, 02:49 AM   #49
radeon 9800 pro
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Join Date: Apr 2003
Location: Darkness Falls
Posts: 841

the "shuffle instruction" optimization is just like having external help from ati, ati tells the shaders "dont do this dont do that skip this skip that, just listen!! coz we know it doesnt matter on GT4 water and sky". in a way, they are just partially pre-calculated siturational shaders.
otherwise, i cant understand why ati wont use this shuffle instruction optimiztion if it works in every case just like a normal PS2 shader.
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