Many Blender users love the new interface of Blender 2.8, but sometimes familiar tools stop working the way they expect. One common problem is the loop select function not working. This tool is essential for quick modeling, and when it fails, it can slow you down or break your workflow.
If you’ve pressed Alt+Click (or Option+Click on Mac) and nothing happens, you’re not alone. There are several reasons this might happen in blender 2.8. This article will walk you through the eight most common causes, offer fixes, and share some tips that even experienced users might miss.
1. Wrong Selection Mode
Blender offers three main selection modes: Vertex, Edge, and Face. The loop select tool only works in Edge select and Face select modes. If you’re in Vertex select, loop select won’t work.
To check or change your selection mode:
- Look in the top left of the 3D view for the three icons: Vertex, edge, and face.
- Click the edge or face icon, or press 2 (edges) or 3 (faces) on your keyboard.
Tip: Many beginners forget to check this and spend time troubleshooting elsewhere.
2. Non-manifold Geometry
Non-manifold geometry means your mesh has holes, disconnected parts, or edges not shared by two faces. Loop select cannot cross these gaps.
Common issues:
- Holes in your mesh
- Internal faces
- Edges that connect to more or less than two faces
To fix non-manifold issues:
- In Edit Mode, press A to select all.
- Use Mesh > Clean Up > Merge by Distance to remove doubles.
- Use Select > Select All by Trait > Non-Manifold to find problem areas.
Example: If a cylinder is missing a cap, loop select can’t go all the way around.
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3. Mouse Shortcut Conflicts
Blender’s shortcuts can sometimes conflict, especially if you’ve imported old preferences or changed default settings. Alt+Click might be assigned to another action or even be used by your operating system.
To check:
- Go to Edit > Preferences > Keymap
- Search for “loop select” or “select edge loop”
- Make sure Alt+Click is set, and change if needed
Mac users: Sometimes Option+Click is used by macOS for system features. Try Alt+Shift+Click or change the shortcut in Blender.
4. Overlay Or X-ray Settings
If overlays or X-ray mode are off, you might not see what you’re selecting, or loop select might behave oddly.
- Check the viewport overlays button (top-right, grid icon).
- Make sure “Edges” and “Faces” are checked.
- Use X-ray mode (shortcut: Alt+Z) to see through geometry.
Non-obvious insight: Sometimes overlays are off after importing models, making selections confusing.
5. Object Mode Vs Edit Mode
Loop select only works in Edit Mode. If you’re in Object Mode, no selection tools for edges or faces are available.
Switching to Edit Mode:
- Select your object
- Press Tab or click the mode menu (top left of 3D view) and choose Edit Mode
Common mistake: Trying to loop select while still in Object Mode.
6. Hidden Or Isolated Geometry
If parts of your mesh are hidden (with H) or you’re in local view (with /), loop select can fail or act unexpectedly.
To unhide everything:
- Press Alt+H in Edit Mode
For local view:
- Press / again to return to global view
Tip: Always check if you’re working on the full mesh, not just a part.
7. Modifier Stack Issues
Modifiers like Mirror, Subdivision Surface, or Boolean can change the mesh in ways that confuse loop select. If a modifier is not applied, the visual mesh may not match the edit mesh.
Here’s how to check:
- Go to the Modifiers tab (wrench icon) in the Properties panel
- Disable the “Show in Edit Mode” or “Show in Cage” buttons to see if it fixes the issue
- If needed, apply the modifier (but be careful—this is permanent)
Example: With Subdivision Surface on, Blender tries to select loops in the base mesh, not the smoothed one.
8. Outdated Graphics Drivers
Sometimes, graphical glitches caused by old GPU drivers can break selection tools. This is rare but can happen, especially on laptops or after Blender updates.
To fix:
- Update your graphics card drivers from the manufacturer’s website
- Restart Blender after updating
Non-obvious: If only loop select is broken but other selections work, it’s worth checking your drivers.
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Comparison: Loop Select In Different Modes
Here’s a look at how loop select behaves in each selection mode:
| Selection Mode | Loop Select Works? | Shortcut |
|---|---|---|
| Vertex Select | No | 1 |
| Edge Select | Yes | 2 |
| Face Select | Yes | 3 |
Troubleshooting Workflow
When loop select fails, follow this checklist:
- Check you are in Edit Mode
- Switch to Edge or Face select
- Look for non-manifold geometry
- Test your Alt+Click shortcut
- Unhide geometry and check overlays
- Inspect the modifier stack
- Update graphics drivers
Example: Fixing A Loop Select Problem
Suppose you import a mesh, and loop select doesn’t work. You switch to Edge select but still can’t select loops. You check for non-manifold geometry and find internal faces. After cleaning up with Merge by Distance and removing non-manifold elements, loop select works again.
Loop Select Vs Ring Select
Many confuse loop select with ring select. Loop select goes around a loop of edges or faces. Ring select (Ctrl+Alt+Click) selects a ring—edges parallel to each other.
| Function | Shortcut | Use Case |
|---|---|---|
| Loop Select | Alt+Click | Selects edge or face loops |
| Ring Select | Ctrl+Alt+Click | Selects edge rings |
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When To Ask For Help
If you’ve tried all these steps and Blender 2.8 loop select still isn’t working, try asking for help on forums. Include screenshots, your Blender version, and system details. The Blender Stack Exchange is a good place to start.
Frequently Asked Questions
Why Does Loop Select Only Work In Edge Or Face Select?
Loop select relies on the structure of edges and faces to find loops. Vertex select doesn’t support this because vertices don’t form clear loops.
What If Alt+click Doesn’t Work On My Mac?
Try Option+Click, or remap the shortcut in Blender’s preferences. Sometimes, macOS uses Option+Click for system features.
Can Loop Select Cross Over Mesh Holes?
No. Loop select stops at non-manifold edges or holes. Clean up your mesh to enable full loops.
Is There A Way To Customize Loop Select Shortcuts?
Yes. Go to Edit > Preferences > Keymap, search for “loop select”, and set any shortcut you prefer.
Will Loop Select Work With All Modifiers?
Some modifiers, like Mirror or Subdivision Surface, can confuse loop select unless applied. Try disabling or applying modifiers if you have trouble.
If you follow these steps, you should be able to fix most Blender 2.8 loop select not working issues quickly. Remember: careful mesh cleanup and understanding selection modes go a long way in making Blender easier to use.
Dorothy Addeo is a senior product reviewer at Safefins.com with years of experience testing kitchen, furniture, backpacks, and everyday lifestyle products. She focuses on comfort, durability, usability, and long-term value through hands-on research and real-world testing. Her goal is to help readers find reliable products with honest, easy-to-understand recommendations they can trust.