Stop modelling collision meshes by hand.

Every game artist hits the same wall. Your prop looks great, but now you need collision, and Unreal will not import it unless every part is named UCX with the right index. Chairs, tables, arches and stairs need several convex parts, so you cut them up by hand, rename, count the index, and do it again for the next forty props.

Collision Director Pro does it in one click. Select your mesh. Pick a shape. Done.

New in 1.1: Multi Hull

Concave props get several convex colliders, one per part, named UCX_Name_00, UCX_Name_01 and so on. The space under a table, the hole of a ring and the inside of an open bowl stay free. You set the maximum number of hulls, how tight they follow the shape, and whether small holes in the mesh count as closed.

Six collider types

Box
Sphere
Capsule
Convex Hull
Multi Hull
Simplified

Pick the cheapest shape that fits. Box, sphere and capsule follow the object's rotation and enclose the whole mesh. Hulls keep a vertex limit, so every collider stays under the 255 polygon limit of Unity and PhysX.

Build your own parts in Edit Mode

Select the seat, click Hull. Select the backrest, click Hull again. Every click adds the next correctly numbered UCX part.

Engine correct naming

Unreal reads UBX, USP, UCP and UCX prefixes with a running index. Unity gets a clean Collider suffix. Godot gets the convcolonly and colonly tags, so the collider imports as collision only. Generic gets a readable COL suffix.

Batch the whole set

Select a hundred objects and generate colliders for each of them in one click.

Totally non destructive

Colliders are separate objects built from your evaluated mesh, so modifiers are respected and your original is never touched.

Organised automatically

Colliders go into a Colliders collection, show as wireframe, are hidden from render, and are parented to the source object so they move with it. Clear the colliders of your selection, or every collider in the scene, with one button.

Requires Blender 4.2 or later. Tested on 4.5 LTS and 5.2 LTS. Pure Python, works on Windows, macOS and Linux.

Works beautifully next to Export Director Pro and LOD Director Pro as a complete game asset pipeline.