The EXT_secondary_color extension requires support of either EXT_separate_specular_color or OpenGL® 1.2. Using EXT_secondary_color, an application can specify the RGB components of the secondary color used in the Color Sum stage, instead of using the default (0,0,0,0) color. This is only relevant when lighting is disabled. For more details, please refer to the complete EXT_secondary_color spec
Related Extensions
EXT_secondary_color requires support of either EXT_separate_specular_color or OpenGL® 1.2 functionality
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