Blending

Blending controls how boolean operations transition between shapes. Instead of sharp intersections, blending creates smooth fillets where shapes meet.

Blending

Available Blend Profiles

  • Sphere Blend (L2 norm): Circular fillet, smooth natural transition
  • Smooth Blend (L4 norm): Super-ellipse with tighter knees
  • Linear Blend (L1 norm): Flat 45-degree chamfer with optional smoothing

How Blending Works

When a Boolean modifier has a Blend Radius greater than 0, the hard boolean operation is replaced with a smooth variant. The distance fields are interpolated within the blend zone, creating a fillet.

Hard Boolean (Blend Radius = 0)

  • Union: min(d1, d2) - sharp crease at intersection
  • Difference: max(d1, -d2) - sharp cut edge
  • Intersect: max(d1, d2) - sharp intersection line

Smooth Boolean (Blend Radius > 0)

  • The shapes smoothly flow into each other within the blend zone
  • Blend profile controls the cross-section shape of the fillet
  • Blend radius controls the width of the transition

See Also

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