Sketchup — Round Corner Crack Top

If the crack is a physical gap:

After investigating user reports and the tool's mechanics, the "crack" is usually caused by one of three specific failures: sketchup round corner crack top

1. The Intersection Failure (The most common cause) SketchUp’s geometry engine has a hard time calculating intersections when curves meet at complex corners. RoundCorner works by projecting arcs along edges. When three or more arcs meet at a corner, the plugin has to calculate a complex surface to close that corner. If the crack is a physical gap: After

2. Hidden Geometry Conflict SketchUp models often have "hidden geometry" or stray lines that users aren't aware of. If you try to round an edge that crosses a hidden intersection line, the plugin gets confused about where the surface stops and starts, leading to a tear in the mesh. Before you give up, try these solutions from

3. The "Too Large Radius" Error If you try to round a 10-inch wide box with a 6-inch radius fillet, the math demands a curve that physically overlaps itself. The plugin attempts to force it, often resulting in the top face collapsing or cracking open because there isn't enough physical space for the curve to exist.

Before you give up, try these solutions from simplest to most advanced.