Can I smooth out the edges of a cylinder to make it look rounder in SketchUp?
Short Answer
Yes — in SketchUp, you can smooth out the edges of a cylinder to make it look rounder by using Soften Edges, which hides and smooths the visible segment lines between faces. This is the most common professional method for improving cylinder appearance in SketchUp. It does not add true curved geometry.
What You Need to Know Before
Warning: Smoothing a cylinder in SketchUp only changes how edges display; it does not increase the actual number of sides. If the cylinder has too few segments, it may still look faceted in close-up views, renders, or exported models.
How to Smooth cylinder edges in SketchUp
Command: Soften Edges
Shortcut: No default keyboard shortcut
Quick Steps:
- Select the cylinder geometry, then right-click and choose Soften/smooth edges or open Window > Default Tray > Soften Edges.
- In the Soften Edges panel, enable the Smooth normals option if available.
- Adjust the Angle between normals slider until the cylinder edges are visually softened and the surface looks rounder.
Variables & Settings
Key Setting: Angle between normals slider
Expert Setting: This controls which connected edges are softened based on the angle between adjacent faces. A higher angle smooths more edges, but if set too high, it can soften edges you may want to keep sharp.
Why it Fails
Cause 1 (Geometry): The cylinder was created with too few sides, so smoothing only hides edges but cannot make the profile truly round.
Cause 2 (layers/Locks): The cylinder or its group/component may be locked, preventing you from editing or applying smoothing properly.
Cause 3 (Command/Logic): You may be smoothing only some faces or edges instead of the entire cylinder, causing uneven shading or visible seam lines.
Quick Fix & Best Practice
- Quick Fix: Recreate the cylinder with a higher Sides value before applying Soften Edges for a cleaner, more realistic result.
- Manager’s Verdict: Use smoothing for presentation and modeling speed, but for fabrication, export, or detailed visualization, build the cylinder with enough segments from the start.
FAQ
Can I make a cylinder truly round in SketchUp?
No, SketchUp cylinders are always made from flat segments.
What is the best number of sides for a smooth cylinder in SketchUp?
It depends on size and view distance, but 48 or more sides is common for a smoother result.
Why do some cylinder edges still show after smoothing?
The soften angle may be too low, or the cylinder may have visible profile edges that remain unsmoothed.
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