Visually, the crack appears as a thin, white, jagged gap or a series of broken lines along the edge where a rounded corner meets the main body of your object. It looks like the rounded piece is separating from the rest of the geometry.
This happens almost exclusively when you use Round Corner (by Fredo6) or Solid Tools on complex meshes.
Don't just use the default settings. Open the Round Corner dialog box and tweak these:
SketchUp is the go-to tool for architects, woodworkers, and 3D hobbyists due to its intuitive push-pull mechanics. However, nothing shatters your workflow faster than watching the infamous "SketchUp Round Corner crack" —that sudden, infuriating moment when the application freezes, glitches, or crashes entirely while trying to fillet or chamfer an edge. sketchup round corner crack
If you have typed roundcorner into your Fredo6 dialog box only to watch your model disappear or your screen turn white, you are not alone. This article dives deep into why this crack happens, how to stop it, and alternative workflows to keep your models smooth and stable.
If you want to use SketchUp's native tools without plugins, the proper technique to avoid cracks is using the Two-Point Arc tool efficiently.
Cleanup: After creating the arc, you must erase the sharp corner lines outside the arc to leave a clean rounded edge. Visually, the crack appears as a thin, white,
Pros: No plugins needed.
Cons: Does not automatically round all corners at once; difficult to control complex geometry.
In the SketchUp community, the "crack" refers to three distinct but related failures when using the RoundCorner extension (by Fredo6): Cleanup: After creating the arc, you must erase
These issues usually occur when processing high-polygon curves or low-tolerance edges.
Sometimes rounding all 12 edges of a cube at once causes a mathematical conflict.
The Round Corner tool works best on Solid Groups.