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updatedAt: 2026-01-14T13:53:39.000Z
agentTools:
projectIndex: https://developer.didimo.co/llms.txt
---
# Intersection Solver: Fixing Deformable Collisions
In this guide, you’ll learn how to use the Intersection Solver to quickly fix problem areas where, for example, clothing intersects with a character’s skin.
We’ll work with a *Heavy* Shape and the *Sport\_Short\_Color1* Deformable.
🎬 Check our Tutorial Video:
# What is the Intersection Solver?
The **Intersection Solver** is a tool that can be associated to any Deformable (garments, accessories) to **detect, visualize and solve intersections** with the Template or Shape it is fitted to - meaning, you can fix an intersection of a Deformable in the Heavy shape only.
This is useful in cases where an imported asset has minor modeling issues or when the clothing doesn’t perfectly conform to the character’s shape.
### How to use the Intersection Solver
1. **Create the Intersection Solver** – Right-click on the Deformable and select **Create → Intersection Solver**.
2. **Detect intersections** – Click **Verify** to detect any intersections between the Deformable and Template/ Shape.
3. **Fix intersections** – Browse the list of detected intersections and fix them individually, or apply all suggested fixes at once by clicking **Fix All**.
4. **Finalize the adjustments** – Either run **Verify** again to check for remaining intersections or save the updated Deformable by clicking **Apply Changes**.
### Fixing intersections between a Template and a Deformable will automatically trigger fitting updates on all the Shapes. As a result, the Deformable’s fitting will improve across all Shapes thanks to the intersection fixes on the Template!
For more information about the Intersection Solver, check the [official documentation](https://developer.didimo.co/docs/intersection-solver).
# 1. Preview Deformable intersection with Template/Shape
Start by dragging the following elements into the Outliner:
* *Heavy*
* *Sport\_Short\_Color1*
**Info:** Rotating the character you’ll likely notice intersection issues right away, for example, the shorts may clip through the body. Let’s fix that.
# 2. Create an Intersection Solver
* In the project tree on the left, locate *Sport\_Shorts\_Color1*
* Right-click on it
* Select: *Create → Intersection Solver*
**Info:** A new object called Intersection Solver will be created as a sub-element of the Sport\_Shorts\_Color1 Deformable.
# 3. Scan for Intersections
* Click the *Intersection Solver* to select it
* In the right-hand panel, click Verify, this will scan for overlapping geometry between the Deformable and the character body
* After the scan, a list of Intersection Groups will appear, each group represents a specific area detected by the system
# 4. Highlight Problem Areas
* Enable Highlight All Groups, the **Popul8 Express** will visually highlight all detected collision zones
* In this case, you’ll see one problematic area in the back of the character.
# 5. Fix All Intersections
* Click Fix All, **Popul8 Express** will automatically apply optimal settings to resolve all detected issues.
**Tip:** You don’t need to adjust any settings manually, the default values work well for most cases.
# 6. Re-Scan for Intersections
* Click Verify to re-scan and check if any additional adjustments are needed
* In this case, a message will be displayed indicating that the Intersection Solver has no longer detected any intersections.
# 7. Apply the Fixes
* Click *Apply Changes* to confirm the fix
* In the confirmation dialog, click *Yes*
**Info:** Your changes are now saved and the intersections are resolved.
# 8. Review Deformable fit on Template/Shape
For peace of mind, drag the following items back into the Outliner:
* *Heavy*
* *Sport\_Shorts\_Color1*
* You can also add *Sport\_Shirt\_Color1*
Your model should now look clean, the armpit issues are gone, and the Deformables have been properly conformed to the character shape. You’re ready to move on!