R (Radius): Physical Size. Is it a microscopic pinhole or a large crack?
Pts (Points): Complexity. Low (3-4) = A simple missing face. High (100+) = A complex structural failure or "zipper" error.
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Engine Architecture Comparison
manifold-3d (WASM)
The Gold Standard. Uses Exact Math (Rational Arithmetic) instead of decimals, guaranteeing the result is perfectly watertight. No rounding errors, no gaps.
three-bvh-csg (JS)
Modern & Efficient. Uses a "Spatial Index" (BVH) to find only the triangles that actually touch. Fast, but relies on standard floating-point math (can have tiny gaps).
three-csg-ts (JS)
Old School (Naive BSP). Slices the entire universe along infinite planes. Creates "cracks" (T-junctions) everywhere, even far from the intersection. Educational, but fragile.