Viśuddha (Throat Chakra) is Disc #05 of the PAPP Chakra Series: a Metatron-Loka style terraced ridge sculpture generated entirely by mathematics (line-distance Gaussian ridges → weighted heightfield → seam subtraction → 14-step terracing) and sealed as a watertight closed manifold (χ=2). The geometry encodes the classical yantra: a full-moon circle (“white like the full moon”) containing a sky-blue downward triangle, surrounded by a 16-petal lotus (16 vowels). Extra ether motifs include a Sadāśiva pentagon and 32 crescent segments, plus space-like ripple waves and Hopf shimmer from the full PAPP 6-stage pipeline (φ-RG κ=φ⁻⁴ → CF → Pythagorean triple → S³ → Hopf → stereographic). Mesh: 57,170 verts / 114,336 faces; Z range −0.218 → 1.690; unique colors 28,986. Seed [64,16,8,16], β*≈135.448, triple (18221,540,18229). Element: Ākāśa (Aether/Space) · Bīja: Haṃ. Generated by PAPP Framework