Quick & Dirty trick to render a debug wireframe for your poly meshes, assuming you are rendering with 8X MSAA (which you are, aren't you, AREN'T YOU!!): In your fragment shader, at the end of the fragment shader, add color = (bitCount(gl_SampleMaskIn[0])<8) ? vec3(0.0) : color;
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As far as I understand: `bitCount(gl_SampleMaskIn[0])` gives you the number of samples that were taken within the polygon. On the edge of the polygon, that number is less than the sample count (8 in this case), as some of the samples are taken (1/2)
outside of the polygon (hence antialiasing). On the interior of the polygon, that number is equal to the sample count, since all of the samples are taken within the polygon boundary. (2/2)
