Repost of an early sketch trying to figure out Birrin armaments

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Birrin basic body plan and run cycle.

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Birrin limb explorations: attempting to find a plausible solution to the structure of the rear leg, the main source of motive power.

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A few folks asked: rough scale of the Birrin.

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An old, never-completed concept for a top predator on the Birrin world.

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