Rounded-square tunnel sections (circle/Chebyshev mix, fbm-wobbled like molten chrome) flying toward a blinding core; ridged-fbm facets catch a cool wash from the depth with sparse speculars on periodic section frames. Molten veins in the palette's complementary colour (Neon: cyan walls + red veins, like the reference) pump with bass/beat. Shader family index 58; in the Auto VJ peak pool. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>