For extremely fine details (less than 1mm), SketchUp's geometry engine can struggle. The workaround is:
If you prefer not to pay, consider these free methods for rounding edges in SketchUp: Fredo "Corner" vs "RoundCorner" License - SketchUp Forums
If you were specifically looking for a plugin named "Corner Crack" (perhaps to create damaged concrete edges), that is a niche feature usually achieved using the Artisan Organic Toolset (sculpting) or by manually disrupting the geometry with the Move tool on a subdivided surface. sketchup round corner crack
However, users frequently encounter the dreaded issue, where the tool produces broken, missing, or distorted geometry instead of a smooth, rounded edge.
Avoid trying to round complex, multi-edge shapes all at once. Apply the tool to simpler sections sequentially. For extremely fine details (less than 1mm), SketchUp's
Avoid over-specifying curves. A tiny 2mm radius corner does not need a 24-segment arc. A 4- or 5-segment arc is usually more than enough to look perfectly round once smoothed, and it dramatically reduces the chances of vertex calculation errors. Automated Solutions: Essential Plugins
Login credentials for your computer, bank accounts, or design firm. Avoid trying to round complex, multi-edge shapes all at once
If you prefer not to use paid extensions, you can achieve rounded corners using SketchUp's built-in tools: Follow Me Tool
: Sometimes the geometry is actually there, but the edges aren't "softened" or "smoothed," making the curve look like a series of broken, faceted cracks rather than a continuous surface. Solutions and Best Practices
If your model has very small, overlapping, or stray edges (common when importing from AutoCAD or Fusion 360), RoundCorner tries to round a line that is 0.001mm long. The plugin enters an infinite loop trying to process geometry smaller than the computational tolerance.
validation system, which requires a valid SketchUcation account. Elmtec Sketchup The Pro-Grade Alternative: FredoCorner vs. Round Corner While the original Round Corner