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Sort of like a strip-light effect; not actually a light source, but just a polygon with glowing edges. Can this be done easily? Right now I'm contemplating drawing a line more than once with varying alpha/width values to achieve this, but I think that'll cause weird glowing points at the vertices, which is far from ideal. |
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This thread talks about rendering a laser beam. It sounds as if you're trying to do something similar. The basic idea is to extrude the line into a polygon, but do it like you'd billboard a point sprite (but for a line segment). On page two in the link I gave they have this texture, which gives a good clue on how to do it:
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