Sketchup Round Corner [upd] Crack Top -

—because the geometry is too small, overlapping, or contains microscopic gaps. Common Causes of Geometry "Cracking" Scale Issues

Reduce your Offset value in the plugin toolbar until the preview shows clean, green lines without red intersections. If you must have a large radius, you may need to simplify the surrounding geometry first. 3. Cleaning Up "Cracked" Top Faces sketchup round corner crack top

SketchUp has difficulty forming very small faces (under 1mm or 1/16 inch). When you round a corner with a high segment count, the resulting faces may be too small for SketchUp to "heal," leaving a gap or crack. —because the geometry is too small, overlapping, or