# Release Notes — v5.15

This is a major update that marks a significant stage in the lifecycle of the IMPULSE platform, namely the introduction of new and improved co-creation and world editing facilities. Additions and improvements include editing UX improvements, transform handles, collider hierarchies and support for different types of colliders.

## v5.15.4

- Collider type selection per world object.
- Support for collider hierarchies.
- Convex and concave mesh colliders.
- New humanoid avatars.

## v5.15.3

- Runtime selection of transform handles type and function.

## v5.15.2

- Transform handles.
- Editing UX improvements.

## v5.15.1

- Internal restructuring for transform handles support.