Bear Engine

Bear Engine is a lightweight and free VTuber software for Linux streamers.

Load your VRM model, and Bear Engine handles the rest: transparent background, mouse-based head tracking, and an always-on-top overlay that works over games and applications.

Features

• Load VRM models directly
• Transparent background — only your avatar is visible
• Mouse head tracking (head + neck movement)
• Always-on-top overlay
• Click-through mode — interact with your games and apps normally
• Move Mode — drag your avatar anywhere on screen
• Customizable outline effect (color + thickness)
• Adjustable arm posing with sliders
• Controls for:
  • position
  • rotation
  • scale
  • tracking sensitivity
• Simple and lightweight control panel

Designed For

Bear Engine is made for Linux streamers who want a simple VRM avatar overlay without complicated setup.

No webcam required. No face tracking required. Just your mouse and your avatar.

Requirements

• Linux
• Python 3.10+
• GPU with OpenGL 3.3 support

Tested on:

• Arch Linux
• KDE Plasma
• XWayland

Open Source Release — Coming Soon

Bear Engine will be released on GitHub so the community can:

• contribute
• report bugs
• suggest features
• help with translations and testing

If you know Python, OpenGL, Linux development, or simply want to help, you are welcome.

The goal is to build the best free VTuber tool for Linux together.

GitHub repository: Coming soon

Important Notice

Bear Engine is a non-profit community project made with care for Linux streamers.

You are free to:

• use it
• share it
• modify it for personal use

However:

• Selling Bear Engine is not allowed
• Redistributing modified paid versions is not allowed
• Including Bear Engine in commercial paid packages is not allowed

If you find someone reselling Bear Engine, please report it.

Please respect the project and the community it was made for.

Made by Bear Kanashi