While simpler and faster for basic cubes, it is "greedier" with face generation and often fails on non-orthogonal edges. If one fails, many pros keep both installed as a backup. 3. Step-by-Step Fix for Cracked Geometry
If you prefer not to use extensions, you can use the tool: Curved face problem - SketchUp Forums
Mastering SketchUp: How to Fix "Crack Top" and Geometry Issues in Round Corners sketchup round corner crack top
If a crack persists, delete the broken top face, round the edges, and then use a tool like Curviloft or the native "Create Face" tools to manually stitch the top back together. 4. Native Alternatives (No Plugins)
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. While simpler and faster for basic cubes, it
A common mistake is using too many segments (e.g., 12 or 24) for a small corner. Lowering this to 6 segments is often enough for a smooth look while keeping the geometry manageable and less prone to breaking.
If your top face is cracking, follow these steps to achieve a clean finish: Step-by-Step Fix for Cracked Geometry If you prefer
The "crack top" issue usually stems from one of three problems:
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".
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.