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.

Reference: What does "Manifold" mean?