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I think SandboxDT was a little bit of surfing with a lot of flattening. But it's strange how such tiny bugs make such a huge difference. I left Neuromancer on the shelf for a long time because for some reason the movement just wasn't working correctly, until I discovered a nested iterator was calling the parent's iterator .next() method instead of its own. Amazing what a difference that made :-p

SandboxDT has a kind of adaptive Random Movement, where it merely adjusts the probability of reversing direction.

That was 2.x, I think 3.x uses some form of precise prediction.