For complex models, the order of operations matters immensely. A common source of errors is adding internal details (like holes or cutouts) before rounding the outer edges. Round Corner can get confused by non-manifold geometry.
Alternatively, reducing the value in Round Corner to 0.001" instead of 0 fixed the crack. sketchup round corner crack top
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. For complex models, the order of operations matters
The Round Corner algorithm works by offsetting edges and trimming geometry. When you apply a fillet to a vertical edge that meets a flat top surface, the extension tries to blend the curve into the plane. If the relative to the thickness of the top slab, the geometry collapses into itself, creating "cracks." Alternatively, reducing the value in Round Corner to 0
This is the most common solution. If your top face is 10mm thick, do not use a 6mm rounding radius. The radius should never exceed half the thickness of the smallest adjacent face .
The best cure is prevention. Here is your pre-flight checklist before using Round Corner on a top face.