New bowlpoly element: the rim is a polygon, every vertex a draggable handle
with its own depth slider. Inside/outside corners, hips, shallow-to-deep
escalators and waterfall drops all come from the same continuous carve (IDW
floor blend, quarter-pipe wall transition) — no seams by construction. Auto
pool coping (bullnose tube, exported as grindable ledge segments per rim
edge) and tile band baked into the ground texture. Ships parks/pool_demo.json
(THE POOLROOM) as a premade showcase; ridden end-to-end in test mode.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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