@pmndrs/bvh
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    Variable REFERENCE_TOLERANCEConst

    REFERENCE_TOLERANCE: 0.001 = 1e-3

    How close to an edge (in barycentric weight) or to tMin/tMax (relative) a hit may be before an f32 tracer is allowed to disagree. Far larger than f32 rounding for well-shaped triangles, small enough to hide almost nothing.