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glBlendFunc

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How do I set glBlendFunc if I want a polygon to be completely visible if alpha = 1.0 and completely transparent if alpha = 0.0 ? thanks

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The "common" setting for glBlendFunc() is

glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );

You then have to render the polygons from back to front.

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