Luppet

Luppet is a Windows-based software platform used for real-time avatar control, primarily in VTubing and live-streamed performances. It allows a user to animate a 3D or 2D character in real time by capturing facial expressions, head movements, and lip-sync from a webcam, and, with optional hardware, hand and body motion as well. The resulting motion is transferred to a virtual avatar during live broadcasts or recordings.

Key features include facial tracking that maps expressions to the avatar, lips and speech synchronization tied to audio input, and smoothing and calibration tools to improve stability. Users can import avatars in common formats such as VRM or FBX, and apply the captured motion to the character in real time. Luppet is designed to output to streaming software through a virtual webcam driver and can also support other outputs like NDI, enabling integration with platforms such as OBS or XSplit.

The software supports various input configurations, allowing creators to work with different combinations of hardware. While facial capture can operate with a standard webcam, many users augment tracking with devices like Leap Motion for hands or other motion trackers for additional body data. Luppet thus fits within the broader VTuber workflow, where content creators prepare avatars in advance and perform live with real-time motion capture.

Reception of Luppet has been mixed, reflecting the broader VTuber tooling landscape. Proponents highlight its ability to deliver expressive, real-time avatar performances with relatively straightforward setup, while critics note that achieving smooth results can require careful calibration and compatible hardware. It is commonly considered alongside other real-time avatar solutions in the VTuber ecosystem.