Round Parameters dialog box

Roll Across Tangent Edges: Modify the blend to roll smoothly across tangent edges it encounters.
Cap Sharp Edges: Modify the blend to roll along sharp edges keeping the original edge in tact.
Roll Along Sharp Edges: Modify the blend to roll along and notch any sharp edges it encounters.
Force Roll Along At Blend Ends: Modify the blend and force it to cliff or keep the shape of the original edge.
Miter at Corner: Modify the blend and force it to form a seam at any sharp corners it encounters.
Roll Around Corners: Modify the blend to roll around any sharp corners it encounters.