When working with Blender, a popular 3D software, many users rely on the Pick Shortest Path tool. This tool helps you select a path of connected vertices, edges, or faces between two points with just a few clicks. It saves time, especially for complex models. But sometimes, you might find that Pick Shortest Path is not working as you expect. This can be confusing and slow down your workflow. Let’s explore the reasons why this happens, how to fix it, and what you should watch out for.
Understanding Pick Shortest Path In Blender
Before fixing the problem, it’s helpful to know how the tool works. Pick Shortest Path selects the shortest connection between two selected elements in Edit Mode. For example, you select one vertex, hold Shift, and select another. Pressing Ctrl+click will select all vertices, edges, or faces in between.
This tool is used in:
- Retopology (creating new mesh layouts)
- UV unwrapping
- Edge loop selection
- Modeling complex shapes
But sometimes, the tool doesn’t behave as expected. Understanding why requires looking at several common causes.
Common Reasons Pick Shortest Path Fails
There are several reasons why this function might not work. Here are the most frequent ones:
- Non-Manifold Geometry: If the mesh has holes, disconnected parts, or other geometry errors, the path can’t be found.
- Wrong Selection Mode: blender has vertex, edge, and face selection modes. If you mix them, the path tool may not work.
- Hidden Geometry: Hidden or masked parts can break the path.
- Separate Mesh Parts: If the two points aren’t connected in the same mesh, no path exists.
- Tool Settings: Some options in the tool settings can block the path.
- Blender Bugs or Version Issues: Sometimes, the problem is with the software itself, especially in older versions.
Let’s look at these issues in more detail and see how to solve them.
Credit: www.reddit.com
How To Fix Pick Shortest Path Not Working
1. Check For Non-manifold Geometry
Non-manifold geometry means the mesh has holes, loose edges, or faces that don’t connect properly. This can block the path.
How to check:
- Go to Edit Mode.
- Select all (A).
- Use Mesh > Clean Up > Select Non-Manifold.
If Blender highlights parts of your mesh, fix them by closing holes or merging stray vertices.
2. Use The Correct Selection Mode
The tool works only if both elements are in the same selection mode. If you start with a vertex, finish with a vertex. The same goes for edges and faces.
Example:
If you select one edge and then a vertex, the path won’t form.
Tip: Look for the icons in the top-left of Edit Mode to confirm your selection type.
3. Unhide And Reveal All Geometry
Hidden mesh parts can block the tool. In Edit Mode, press Alt+H to unhide everything. Make sure no parts are masked or hidden.
4. Ensure Elements Are In The Same Mesh
If you have separate mesh objects, Blender won’t find a path. Join objects first (Ctrl+J) if needed, and make sure both points are in the same mesh.
5. Check Tool Settings
Sometimes, the settings for Pick Shortest Path are changed. For example, “Face Stepping” or “Topology Distance” can change how the path is found.
Here’s a simple comparison of key settings:
| Setting | Effect |
|---|---|
| Face Stepping | Allows the path to cross faces, not just edges |
| Topology Distance | Considers path based on mesh topology, not just direct connection |
| Edge Tagging | Limits path to tagged edges only |
Try resetting the tool settings or disabling options you don’t need.
6. Update Or Reinstall Blender
Bugs are sometimes the cause. Check if you’re using the latest version. Visit the official Blender site for updates.
Real-world Example
Imagine you’re modeling a complex chair. You want to quickly select a row of connected edges along the seat. You select the first edge, then Shift+select the last one, and use Ctrl+click. Nothing happens. After checking, you find some vertices are not welded (merged), causing the path to break.
By merging those vertices, the tool works perfectly.
Credit: www.oreilly.com
Advanced Tips And Non-obvious Insights
Many beginners miss these details:
- Edge Direction Matters: Sometimes, the tool prefers one direction over another, especially on symmetrical meshes. Try selecting the start and end points in the reverse order.
- Double Vertices: Overlapping vertices can look like a single point but break the path. Use Mesh > Clean Up > Merge by Distance to remove doubles.
- Large Meshes: On very large meshes, the tool can be slow or seem unresponsive. Waiting a few seconds sometimes helps.
Preventing Future Problems
To avoid issues in the future, follow these best practices:
- Regularly clean up your mesh using Blender’s cleanup tools.
- Stay organized with your mesh objects—avoid unnecessary splits.
- Learn shortcut keys for hiding, revealing, and joining objects.
- Update Blender when new stable versions release.
- Test the tool on a simple mesh first if you’re unsure.
Here’s a comparison of successful versus failed scenarios:
| Situation | Pick Shortest Path Result |
|---|---|
| All vertices connected, no doubles | Works as expected |
| Hidden geometry present | Fails to select path |
| Mixed selection modes (edge + vertex) | No path found |
| Separate mesh objects | No path found |
Credit: blender.stackexchange.com
Frequently Asked Questions
Why Is Pick Shortest Path Grayed Out In Blender?
Usually, this happens if you’re not in Edit Mode or don’t have at least two elements selected. Check your selection and mode.
Can I Use Pick Shortest Path With Faces, Not Just Edges?
Yes, but you must be in face selection mode, and your start and end selections must both be faces.
Does Pick Shortest Path Work On Curves Or Only Meshes?
It works only on mesh objects. For curves, you need different selection methods.
What Does “non-manifold” Mean In Blender?
A non-manifold mesh has geometry errors like holes, disconnected faces, or stray edges. These can block many tools, including Pick Shortest Path.
Is There A Way To Customize The Path Selection Behavior?
Yes. In the tool settings (bottom left after using the tool), you can change options like “Face Stepping” and “Topology Distance” for different results.
Solving issues with Pick Shortest Path in Blender can save hours on complex projects. By understanding the common causes and applying these solutions, you can keep your modeling fast and frustration-free. For more on mesh editing, the Blender Manual is a great resource. Happy modeling!
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.