Funny how fast this thread went from Gradius to VDP modes to La Tomatina, and in less than 24 hours too...
Anyways, let me try to re-explain what I'm wondering about:
Let's say you have a laser and shoot it. Then you get a laser object originating at a point based on Vicky's current coordinates, and with a size of 1:
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Then, the way I see it, on the next frame or so the laser moves forward 8 pixels, and another piece is added on:
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···=|==> ====
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But, if you were moving fast enough backwards, there would be a gap between segments:
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···=|==> == ==
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And with forward movement, laser tiles would be stacked on top of each other, making the overall beam smaller. But, neither of these things happen, so Konami must have taken a different approach.