KawaiiPhysics is a physics simulation plugin for Unreal Engine that simulates secondary motion for character elements like hair, skirts, and clothing.
The plugin addresses the need to animate secondary motion on characters without building complex physics setups. It uses a simplified bone physics approach designed to be straightforward to configure while producing visually appealing results. Rather than relying on full rigid body dynamics, the tool applies pseudo-physics calculations to bones, allowing animators and developers to create natural-looking jiggle and sway effects with minimal setup overhead.
The tool suits projects where character polish matters but physics authoring time is limited. It works well for games and real-time applications featuring stylized characters where secondary motion enhances visual appeal. The plugin integrates directly into Unreal Engine's animation pipeline, making it accessible to teams already working within that ecosystem. Documentation and community discussion channels are available to support adoption and troubleshooting.
The project maintains active engagement with its user base through discussion forums and documentation updates. The codebase receives ongoing refinement to support current and recent engine versions. Multiple contributors have participated in development, indicating collaborative maintenance beyond a single author.
