I see what Thunder means, if you start at the beam point and work backwards along the hull, you see that the part between the saddle in the hull and the beam glow, along the side of the ship, does look a bit blurred. Compare to the very back, which looks quite sharp. I don't know what causes it...
But the beam looks absolutely excellent. I would use a star flare myself instead of the ring, but that's just a style choice.

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