Sketchup — Round Corner Crack Top !!top!!

While SketchUp is incredibly versatile, it wasn't natively designed for complex edge rounding. To get professional results, you’ll almost always need a specialized extension or a few expert workarounds. 1. Why Do "Cracks" Appear?

The "crack top" issue usually stems from one of three problems: sketchup round corner crack top

If the top face of your object isn't perfectly flat, standard rounding tools will fail to calculate how the curve should meet the surface, leading to geometric "tears". While SketchUp is incredibly versatile, it wasn't natively

This is the newer, more powerful tool. It uses an improved algorithm that handles complex, irregular shapes much better than its predecessor. It includes a Repair button and parametric abilities, allowing you to edit or undo rounding if it creates a crack. Why Do "Cracks" Appear

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.

If you prefer not to use extensions, you can use the tool: Curved face problem - SketchUp Forums

Before applying any rounding, scale your entire model up by 10x or 100x. This bypasses the "tiny face" limitation. Once the rounding is finished, scale it back down—the tiny faces will remain intact.