# Water

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**A sea that knows its shore.** [b3d-water](/b3d-water/) is the surface:
waves, reflections, and with `shore="on"` the surf, shallows and sea ice that
come from knowing where the land is. Beneath it are the pieces: the shore
rule, the caustics on the seabed, and what it means to be under water at all.

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- [b3d-water](/b3d-water/)
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