> For the complete documentation index, see [llms.txt](https://pmc-docs.gitbook.io/pmc-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://pmc-docs.gitbook.io/pmc-docs/prophunt-interaction-phi/fixing-incorrect-collision-on-props.md).

# Fixing Incorrect Collision on Props

### <mark style="color:blue;">Step 1:</mark> Inspect the Mesh Collision

Open the Static Mesh asset.

Click the eye icon in the viewport toolbar and enable Simple Collision
\
to visualize the current collision shape.

If the collision does not closely match the mesh (as shown in the example below),
\
continue to the next step.

<figure><img src="/files/qSn65jVfYLkbNgZYRG3S" alt=""><figcaption></figcaption></figure>

### <mark style="color:blue;">Step 2:</mark> Generate Auto Convex Collision

In the top toolbar, open the Collision menu and select Auto Convex Collision.

<figure><img src="/files/lEHU1hF5kDo4xcfKhwsh" alt=""><figcaption></figcaption></figure>

### <mark style="color:blue;">Step 3:</mark> Apply the New Collision

In the Auto Convex Collision panel (bottom-right),
\
click Apply to generate a new convex collision shape.

In most cases, this resolves ground contact and stability issues immediately.

<figure><img src="/files/jtimTSn4QsxUvuamOZSt" alt=""><figcaption></figcaption></figure>

<mark style="color:$warning;">Note on Performance</mark>

Auto Convex Collision generates more complex collision shapes. Using high hull counts or applying this to many meshes may increase collision cost.

<mark style="color:$warning;">It is recommended to:</mark>

* Use Auto Convex Collision only on props that exhibit grounding issues
* Keep hull counts as low as possible
* Avoid applying complex collision to large numbers of background or decorative meshes