The "top" of an object is vulnerable because it is often a (a face with more than 4 sides). When the rounding algorithm hits a complex ngon at the top, combined with a sharp curvature, the calculations fail to stitch the mesh closed.
If you are trying to use the and it is failing, creating gaps, or literally "cracking" your geometry, here is how to fix it: sketchup round corner crack top
Here is the "story" of why this happens and how you can fix it. 1. The Mystery of the "Tiny Face" Limit The "top" of an object is vulnerable because
Seeing "cracks" or gaps on the top face of your SketchUp model after using a rounding tool is a common headache. It usually happens when the geometry gets too complex for the plugin to calculate cleanly, or when SketchUp's internal "tiny face" limit is triggered. Common Causes of "Cracks" Common Causes of "Cracks" : SketchUp has a
: SketchUp has a known limitation where it cannot create very small faces (less than ~1mm). When rounding small objects, the tool may fail to close the new geometry.
Most users searching for this term are looking for the popular RoundCorner extension by Fredo6 . This tool allows you to round the edges and corners of 3D shapes along a 2D profile.